Synaptics (SYNA) 10-K 24 Aug 18 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2018	Aug. 10, 2018	Dec. 29, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Registrant Name	SYNAPTICS INCORPORATED
Trading Symbol	SYNA
Entity Central Index Key	817,720
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		35,362,071
Entity Public Float			$ 915,511,549

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Current Assets:
Cash and cash equivalents	$ 301	$ 367.8
Accounts receivable, net of allowances of $1.8 and $2.6 at June 2018 and 2017, respectively	289.1	255.2
Inventories	131.2	131.4
Prepaid expenses and other current assets	18.2	37.6
Total current assets	739.5	792
Property and equipment, net	117.8	113.8
Goodwill	372.8	206.8
Acquired intangibles, net	219.2	101
Non-current other assets	50.5	53.1
Total assets	1,499.8	1,266.7
Current Liabilities:
Accounts payable	156.9	135.8
Accrued compensation	25.4	31.9
Income taxes payable	13.1	17.2
Acquisition-related liabilities	8.7	8.7
Other accrued liabilities	79.7	101.8
Current portion of long-term debt		15
Total current liabilities	283.8	310.4
Long-term debt, net of issuance costs		202
Convertible notes, net	450.7
Other long-term liabilities	36	14.1
Total liabilities	770.5	526.5
Commitments and contingencies
Stockholders' Equity:
Preferred stock: $0.001 par value; 10,000,000 shares authorized; no shares issued and outstanding
$0.001 par value; 120,000,000 shares authorized, 62,889,679 and 60,579,911 shares issued, and 35,249,803 and 34,638,435 shares outstanding, at June 2018 and 2017, respectively	0.1	0.1
Additional paid-in capital	1,195.2	1,004.8
Treasury stock: 27,639,876 and 25,941,476 common shares at June 2018 and 2017, respectively, at cost	(1,073.9)	(980.3)
Accumulated other comprehensive income	1.5	1.5
Retained earnings	606.4	714.1
Total stockholders' equity	729.3	740.2
Liabilities and stockholders' equity	$ 1,499.8	$ 1,266.7

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 1.8	$ 2.6
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	62,889,679	60,579,911
Common stock, shares outstanding	35,249,803	34,638,435
Common treasury shares	27,639,876	25,941,476

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Income Statement [Abstract]
Net revenue	$ 1,630.3	$ 1,718.2	$ 1,666.9
Cost of revenue	1,150.2	1,194.6	1,085.4
Gross margin	480.1	523.6	581.5
Operating expenses:
Research and development	363.2	292.3	311.2
Selling, general, and administrative	154	137.6	161.7
Acquired intangibles amortization	12.8	11.7	18.6
Impairment of acquired intangibles			6.7
Change in contingent consideration			(0.5)
Restructuring costs	12	7.3	8.6
Litigation settlement charge		10
Total operating expenses	542	458.9	506.3
Operating income/(loss)	(61.9)	64.7	75.2
Interest and other income	2.3	0.7	3.1
Interest expense	(22.2)	(6)	(4.8)
Impairment recovery on investments, net		1.9	2.1
Income/(loss) before provision for income taxes and equity investment loss	(81.8)	61.3	75.6
Provision for income taxes	40.5	12.2	3.4
Equity investment loss	(1.8)	(0.3)
Net income/(loss)	$ (124.1)	$ 48.8	$ 72.2
Net income/(loss) per share:
Basic	$ (3.63)	$ 1.40	$ 1.97
Diluted	$ (3.63)	$ 1.37	$ 1.91
Shares used in computing net income/(loss) per share:
Basic	34.2	34.8	36.6
Diluted	34.2	35.6	37.9

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income/(loss)	$ (124.1)	$ 48.8	$ 72.2
Other comprehensive loss, net of tax:
Change in unrealized net loss on investments		(1.5)	(2.7)
Reclassification from accumulated other comprehensive loss to interest income for accretion of non-current investments		(0.3)	(1.8)
Net current-period other comprehensive loss		(1.8)	(4.5)
Comprehensive income/(loss)	$ (124.1)	$ 47	$ 67.7

Consolidated Statements of Stoc

Consolidated Statements of Stockholders Equity - USD ($) $ in Millions	Total	As Adjusted [Member]	Common Stock [Member]	Common Stock [Member]As Adjusted [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]As Adjusted [Member]	Treasury Stock [Member]	Treasury Stock [Member]As Adjusted [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member]As Adjusted [Member]	Retained Earnings [Member]	Retained Earnings [Member]As Adjusted [Member]
Balance, value at Jun. 27, 2015	$ 793.1		$ 0.1		$ 843.8		$ (651.7)		$ 7.8		$ 593.1
Balance, shares at Jun. 27, 2015			58,249,107
Net income/(loss)	72.2										72.2
Other comprehensive income	(4.5)								(4.5)
Issuance of common stock for share- based award compensation plans	32.4				32.4
Issuance of common stock for share-based award compensation plans, shares			1,283,041
Payroll taxes for deferred stock units	(15.6)				(15.6)
Purchases of treasury stock	(240.6)						(240.6)
Tax benefit (deficiency) associated with share-based awards	11.2				11.2
Share-based compensation	56.8				56.8
Balance, value at Jun. 25, 2016	705		$ 0.1		928.6		(892.3)		3.3		665.3
Balance, shares at Jun. 25, 2016			59,532,148
Net income/(loss)	48.8										48.8
Other comprehensive income	(1.8)								(1.8)
Issuance of common stock for share- based award compensation plans	24.7				24.7
Issuance of common stock for share-based award compensation plans, shares			1,047,763
Payroll taxes for deferred stock units	(6.6)				(6.6)
Purchases of treasury stock	(88)						(88)
Tax benefit (deficiency) associated with share-based awards	(3.7)				(3.7)
Share-based compensation	61.8				61.8
Balance, value at Jun. 24, 2017	740.2	$ 757.6	$ 0.1	$ 0.1	1,004.8	$ 1,005.8	(980.3)	$ (980.3)	1.5	$ 1.5	714.1	$ 730.5
Balance, shares at Jun. 24, 2017			60,579,911	60,579,911
Cumulative effect of changes in accounting principles for income taxes: intra-entity transfers of assets other than inventory	(8.3)										(8.3)
Cumulative effect of changes in accounting principles for share-based compensation	25.7				1						24.7
Net income/(loss)	(124.1)										(124.1)
Issuance of common stock for share- based award compensation plans	32.3				32.3
Issuance of common stock for share-based award compensation plans, shares			1,583,102
Issuance of common stock for acquisition	39.1				39.1
Issuance of common stock for acquisition, shares			726,666
Payroll taxes for deferred stock units	(5.4)				(5.4)
Purchases of treasury stock	(93.6)						(93.6)
Share-based compensation	71.3				71.3
Issuance of Convertible debt	52.1				52.1
Balance, value at Jun. 30, 2018	$ 729.3		$ 0.1		$ 1,195.2		$ (1,073.9)		$ 1.5		$ 606.4
Balance, shares at Jun. 30, 2018			62,889,679

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Cash flows from operating activities
Net income/(loss)	$ (124.1)	$ 48.8	$ 72.2
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Share-based compensation costs	71.3	61.8	56.8
Depreciation and amortization	38.9	33.2	31.2
Acquired intangibles amortization	83.9	59.3	73
Accretion and remeasurement of contingent consideration liability			(0.5)
Deferred taxes	4.9	(17.4)	(21.1)
Impairment of property and equipment			3
Impairment of acquired intangibles			6.7
Non-cash interest		(0.3)	(1.8)
Amortization of convertible debt discount and issuance costs	16.9
Amortization of debt issuance costs	1.6	1.2	1
Impairment recovery on investments, net		(1.9)	(2.1)
Equity investment loss	1.8	0.3
Foreign currency remeasurement (gain)/loss		(0.2)	8.2
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(22.7)	(2.6)	72
Inventories	79.5	15	(6.2)
Prepaid expenses and other current assets	18.8	(9.6)	5.8
Other assets	(7.2)	6.5	5.6
Accounts payable	6.2	(38.4)	(15.3)
Accrued compensation	(8.1)	(7.8)	3.3
Acquisition related liabilities		(16.8)	(18.2)
Income taxes payable	5.4	2.3	(26.1)
Other accrued liabilities	(22.1)	19.5	9.1
Net cash provided by operating activities	145	152.9	256.6
Cash flows from investing activities
Acquisition of businesses, net of cash and cash equivalents acquired	(396.7)
Proceeds from sales of investments		7.5	6.6
Purchases of property and equipment	(34.1)	(31.4)	(28.6)
Purchase of intangible assets	(7.7)		(4.6)
Investment in direct financing lease		(17)
Proceeds from direct financing leases		17
Equity method investment		(18.4)
Net cash used in investing activities	(438.5)	(42.3)	(26.6)
Cash flows from financing activities
Proceeds from issuance of convertible debt, net of issuance costs	514.5
Payment of acquisition-related liabilities		(5.3)	(60.9)
Payment of debt	(220)	(18.8)	(7.6)
Purchases of treasury stock	(93.6)	(88)	(240.6)
Proceeds from issuance of shares	32.3	24.7	32.4
Payment of debt issuance costs	(1.1)	(1.2)	(0.3)
Excess tax benefit from share-based compensation		1.1	11.5
Payroll taxes for deferred stock and market stock units	(5.4)	(6.6)	(15.6)
Net cash provided by/(used in) financing activities	226.7	(94.1)	(281.1)
Effect of exchange rate changes on cash and cash equivalents		(0.9)	3.4
Net increase/(decrease) in cash and cash equivalents	(66.8)	15.6	(47.7)
Cash and cash equivalents at beginning of year	367.8	352.2	399.9
Cash and cash equivalents at end of year	301	367.8	352.2
Supplemental disclosures of cash flow information
Cash paid for interest	3.8	6	5
Cash paid for taxes	26.4	22.1	46.9
Cash refund on taxes	1.7	10.1	18
Non-cash investing and financing activities:
Property and equipment received but unpaid	6.6	$ 6	$ 3.1
Common stock issued pursuant to acquisition	$ 39.1

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Organization and Summary of Significant Accounting Policies	1. Organization and Summary of Significant Accounting Policies Organization and Basis of Presentation We are a leading worldwide developer and supplier of custom-designed human interface semiconductor product solutions that enable people to interact more easily and intuitively with a wide variety of mobile computing, communications, entertainment, and other electronic devices. We currently generate revenue from the markets for smartphones, tablets, personal computer, or PC, products, primarily notebook computers, Internet of Things, or IoT, which includes devices with voice, speech and video within smart homes, and other select electronic devices, including devices in automobiles, with our custom human interface solutions. Every solution we deliver either contains or consists of our touch-, display driver-, fingerprint authentication-based-, voice and speech-, or video-semiconductor solutions, which include our chip, customer-specific firmware, and software. Our original equipment manufacturer, or OEM, customers include many of the world’s largest OEMs for smartphones, most of the world’s largest PC OEMs, and many large OEMs for voice- speech and video products. The consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles, or U.S. GAAP, and include our financial statements and those of our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation. Our fiscal year is the 52- or 53-week period ending on the last Saturday in June. The fiscal years presented in this report were a 53-week period ended June 30, 2018, and 52-week periods ended June 24, 2017 and June 25, 2016. For simplicity, the accompanying consolidated financial statements have been shown as ending on calendar year end dates as of and for all periods presented, unless otherwise indicated. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue, allowance for doubtful accounts, cost of revenue, inventories, loss on purchase commitments, product warranty, accrued liabilities, share-based compensation costs, provision for income taxes, deferred income tax asset valuation allowances, uncertain tax positions, goodwill, intangible assets, investments, contingent consideration liability and loss contingencies. We base our estimates on historical experience, applicable laws and regulations, and various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Cash Equivalents and Investments Cash equivalents consist of highly liquid investments with original maturities of three months or less. Our non-current investments, which are included in non-current other assets in the consolidated balance sheets, consist of ARS investments and are reported at fair value, with unrealized gains and losses excluded from earnings and shown separately as a component of accumulated other comprehensive income within stockholders’ equity. We charge other-than-temporary declines in the fair value of a debt security to earnings if the decline is due to a credit loss or if we intend to or need to sell at a loss, resulting in the establishment of a new cost basis in the debt security. We charge other-than-temporary declines in the fair value of a debt security to other comprehensive income if the decline is due to a noncredit loss. We charge other-than-temporary declines in the fair value of an equity security to earnings. We include interest earned and accretion on securities in interest income. We determine realized gains and losses on the sale of securities using the specific identification method. Our cash equivalents and investments classified as available-for-sale securities as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 275.2 $ — $ 275.2 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 275.2 $ 1.5 $ 276.7 2017 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 361.7 $ — $ 361.7 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 361.7 $ 1.5 $ 363.2 Fair Value We measure certain financial assets and liabilities at fair value. When we measure fair value on either a recurring or nonrecurring basis, inputs used in valuation techniques are assigned a hierarchical level as follows: • Level 1 inputs are observable inputs that reflect quoted prices for identical assets or liabilities in active markets. • Level 2 inputs reflect quoted prices for identical assets or liabilities in markets that are not active; quoted prices for similar assets or liabilities in active markets; inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3 inputs are unobservable inputs reflecting our assumptions, which are incorporated into valuation techniques and models used to determine fair value. The assumptions are consistent with market participant assumptions that are reasonably available. Financial assets measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Money market $ 275.2 $ — $ — $ 361.7 $ — $ — Auction rate securities — — 1.5 — — 1.5 Total available-for-sale securities $ 275.2 $ — $ 1.5 $ 361.7 $ — $ 1.5 In connection with the acquisition of Validity Sensors, Inc., or Validity, we entered into a contingent consideration arrangement. As of June 30, 2018, the balance of $8.7 million represents a contractual liability which is no longer subject to valuation as the carrying amount approximates the fair value. The balance represents amounts we have not paid and have retained, subject to resolution of matters related to the Amkor Technology legal dispute (see Legal Proceedings under Note 7 Commitments and Contingencies). Changes in fair value of our Level 3 financial assets for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 1.5 $ 8.6 Net unrealized loss - (1.5 ) Impairment recovery on redeemed investments - 1.9 Redemptions - (7.5 ) Ending balance $ 1.5 $ 1.5 There were no transfers in or out of our Level 1, 2 or 3 assets during fiscal 2018 or 2017. The fair values of our accounts receivable and accounts payable approximate their carrying values because of the short-term nature of those instruments. Intangible assets, property and equipment, and goodwill are measured at fair value on a non-recurring basis if impairment is indicated. The interest rate on our bank debt is variable, which is subject to change from time to time to reflect a market interest rate; accordingly, the carrying value of our bank debt approximates fair value. Concentration of Credit Risk Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash equivalents, investments, and accounts receivable. Our investment policy, which is predicated on capital preservation and liquidity, limits investments to U.S. government treasuries and agency issues, taxable securities, and municipal issued securities with a minimum rating of A1 (Moody’s) or P1 (Standard and Poor’s) or their equivalent. Included within our investment portfolio are investments in ARS investments, which met our investment guidelines at the time of investment. Our ARS investments are currently not liquid as a result of continued auction failures. We sell our products to contract manufacturers that provide manufacturing services for OEMs, and to some OEMs directly. We extend credit based on an evaluation of a customer’s financial condition, and we generally do not require collateral. The following customers accounted for more than 10% of our accounts receivable balance as of the end of fiscal 2018 and 2017: 2018 2017 Customer A 13% 13% Customer B 11% 17% Customer C 10% 15% * Less than 10% Other Concentrations Our products include certain components that are currently single sourced. We believe other vendors would be able to provide similar components, however, the qualification of such vendors may require extra lead time. In order to mitigate any adverse impacts from a disruption of supply, we strive to maintain an adequate supply of critical single-sourced components. Revenue Recognition We recognize revenue from product sales when there is persuasive evidence that an arrangement exists, delivery has occurred, and title has transferred, the price is fixed or determinable, and collection is reasonably assured. We accrue for estimated sales returns, incentives and other allowances at the time we recognize revenue. Our products contain embedded firmware and software, which together with, or consisting of, our ASIC chip, deliver the essential functionality of our products and, as such, software revenue recognition guidance is not applicable to our products. The majority of our sales to distributors are made under agreements that generally do not provide for price adjustments after purchase and revenue recognition and provide for only limited return rights under product warranty. Revenue on these sales is recognized in the same manner as sales to our non-distributor customers. Some of our sales are to distributors which have limited stock rotation rights, which allow them to rotate a small portion of product in their inventory a maximum of two times per year. When sales rebates, price allowances or stock rotations are applicable, they are estimated and recorded in the period the related revenue is recognized. Advertising Costs Advertising costs, if any, are expensed when incurred. Allowance for Doubtful Accounts We maintain allowances for doubtful accounts for estimated losses resulting from the inability of customers to meet their financial obligations. On an ongoing basis, we evaluate the collectability of accounts receivable based on a combination of factors. In circumstances in which we are aware of a specific customer’s potential inability to meet its financial obligation, we record a specific reserve of the bad debt against amounts due. In addition, we make judgments and estimates on the collectability of accounts receivable based on our historical bad debt experience, customers’ creditworthiness, current economic trends, recent changes in customers’ payment trends, and deterioration in customers’ operating results or financial position. If circumstances change adversely, additional bad debt allowances may be required. For all periods presented, credit losses on our accounts receivable have been insignificant, and we believe that an adequate allowance for doubtful accounts has been provided. Cost of Revenue Our cost of revenue includes the cost of products shipped to our customers, which primarily includes the cost of products built to our specifications by our contract manufacturers, the cost of silicon wafers supplied by independent semiconductor wafer manufacturers, and the related assembly, package, and test costs of our products. Also included in our cost of revenue are personnel and related costs, including share-based compensation, for quality assurance and manufacturing support personnel; logistics costs; depreciation of equipment supporting manufacturing; acquired intangibles amortization; fair value adjustments associated with acquired businesses; inventory write-downs and losses on purchase obligations; and warranty costs. Inventories Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value as of the end of fiscal 2018 and 2017 and consisted of the following (in millions): 2018 2017 Raw materials and work-in-progress $ 105.0 $ 94.7 Finished goods 26.2 36.7 $ 131.2 $ 131.4 We record a write-down, if necessary, to reduce the carrying value of inventory to its net realizable value. The effect of these write-downs is to establish a new cost basis in the related inventory, which we do not subsequently write up. We also record a liability and charge to cost of revenue for estimated losses on inventory we are obligated to purchase from our contract manufacturers when such losses become probable from customer delays, order cancellations, or other factors. Property and Equipment We state property and equipment at cost less accumulated depreciation and amortization. We compute depreciation using the straight-line method over the estimated useful lives of the assets. We amortize leasehold improvements over the shorter of the lease term or the useful life of the asset. Other Assets In April 2017, we paid $18.4 million for a 14.4% interest in OXi Technology Ltd., or OXi. Our investment in OXi is included in non-current other assets on our consolidated balance sheet. We determined the equity method of accounting applies to our investment as we have significant influence over OXi’s operating and financial policies. We record our portion of OXi’s net income/(loss) on a one quarter lag due to the timing of the availability of OXi’s financial records. In addition, we amortize intangible assets that we recorded under the equity method of accounting, and such amortization as well as our portion of Oxi’s net income/(loss) is included in equity investment loss on our consolidated statements of income. As of June 30, 2018, we did not have any related party transactions with OXi. Foreign Currency The U.S. dollar is our functional and reporting currency. We remeasure our monetary assets and liabilities not denominated in the functional currency into U.S. dollar equivalents at the rate of exchange in effect on the balance sheet date. We measure and record non-monetary balance sheet accounts at the historical rate in effect at the date of transaction. We remeasure foreign currency expenses at the weighted average exchange rate in the month that the transaction occurred. These foreign currency transactions and remeasurement gains and losses, resulted in a net loss of $1.1 million, $0.7 million and $5.8 million in fiscal 2018, 2017, and 2016, respectively. Gains and losses resulting from foreign currency transactions are included in selling, general, and administrative expenses in the consolidated statements of income. We also enter into foreign currency contracts to manage exposure related to certain foreign currency obligations. The foreign currency contracts are not designated as hedging instruments and, accordingly, are not subject to hedge accounting. As of June 30, 2018 and 2017, we had no outstanding foreign currency forwards. In fiscal 2016 we recognized net realized gains of $4.8 million on foreign currency forward contracts, which are recorded in selling, general, and administrative expenses in the consolidated statements of income. Goodwill Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired. Changes in our goodwill balance for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 206.8 $ 206.8 Acquisition activity 157.3 - Post acquisition adjustments 8.7 - Ending balance $ 372.8 $ 206.8 We have allocated our goodwill to two reporting units. We perform a qualitative assessment of the goodwill in the fourth quarter of each fiscal year. In assessing the qualitative factors, we considered the impact of key factors including change in industry and competitive environment, market capitalization, stock price, gross margin and cash flow from operating activities. We concluded that the fair value of the reporting units exceeded their carrying amount, therefore, there is no need for impairment. No goodwill impairment was recognized for fiscal 2018, 2017, and 2016. Impairment of Long-Lived Assets We evaluate long-lived assets, such as property and equipment and intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. We measure recoverability of assets to be held and used by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. We review the carrying value of indefinite-lived intangible assets for impairment at least annually during the last quarter of our fiscal year, or more frequently if we believe indicators of impairment exist. If the carrying amount of the asset exceeds its estimated undiscounted future cash flows, we recognize an impairment charge in an amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the consolidated balance sheets and reported at the lower of the carrying amount or fair value less costs to sell and would no longer be depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the consolidated balance sheets. During fiscal 2016, we recorded a $6.7 million impairment charge for an acquired intangible asset related to ThinTouch developed technology, which we determined is probable not to be recoverable, based on revenue forecasts. This intangible asset has been written down to zero. During fiscal 2018 and 2017, we did not have an impairment charge. Other Accrued Liabilities As of the end of fiscal 2018 and 2017, other accrued liabilities consisted of the following (in millions): 2018 2017 Customer obligations $ 26.4 $ 34.8 Inventory obligations 28.8 41.8 Warranty 5.5 4.4 Other 19.0 20.8 $ 79.7 $ 101.8 Segment Information We operate in one segment: the development, marketing, and sale of intuitive human interface solutions for electronic devices and products. The chief operating decision maker is the chief executive officer who evaluates financial performance and allocates resources using financial information reported on a company-wide basis. Share-Based Compensation We utilize the Black-Scholes option pricing model to estimate the grant date fair value of stock options granted to employees, which requires the input of highly subjective assumptions, including expected volatility and expected life. Historical and implied volatilities were used in estimating the fair value of our stock option awards. The expected life for our options was previously estimated based on historical trends since our initial public offering. In fiscal 2011, we began to grant options with a contractual life of seven years rather than 10 years, and we began using the simplified method to establish the expected life as we did not have any history of options with seven-year lives; after the first quarter of fiscal 2018 we ceased the granting of stock options. Our outstanding options have vesting periods of three or four years, depending on when they were granted, and we have continued to use the simplified method to establish the expected life. Changes in these inputs and assumptions can materially affect the measure of estimated fair value of our share-based compensation. Further, in fiscal years prior to 2018, we estimated forfeitures for share-based awards that were not expected to vest (see Note 9 for further discussion on estimated forfeitures). We charge estimated fair value less estimated forfeitures to earnings on a straight-line basis over the vesting period of the entire underlying award, which is generally three to four years for our stock option and deferred stock unit, or DSU, awards, three years for our market stock unit, or MSU, awards, three years for our performance stock units, or PSU, awards, and up to two years for our employee stock purchase plan. We estimate the fair value of market-based MSUs at the date of grant using a Monte Carlo simulation model and amortize those fair values over the requisite service period, generally three years. The Monte Carlo simulation model that we use to estimate the fair value of market-based MSUs at the date of grant incorporates into the valuation the possibility that the market condition may not be satisfied. Provided that the requisite service is rendered, the total fair value of the market-based MSUs at the date of grant must be recognized as compensation expense even if the market condition is not achieved. However, the number of shares that ultimately vest can vary significantly with the performance of the specified market criteria. We value the PSUs using the aggregate intrinsic value on the date of grant and amortize the compensation expense over the three-year service period on a ratable basis, dependent upon the probability of meeting the performance measures. Income Taxes We account for income taxes under the asset and liability method. We recognize deferred tax assets and liabilities for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and operating loss and tax credit carryforwards. We measure deferred tax assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. We recognize the effect of a change in tax rates in income on deferred tax assets and liabilities in the period that includes the enactment date. We establish valuation allowances when necessary to reduce deferred tax assets to the amounts that are more likely than not to be realized. We consider the operating earnings of our foreign subsidiaries to be indefinitely invested outside the United States. Accordingly, no provision has been made for the state or foreign taxes that may result from future remittances of undistributed earnings of our foreign subsidiaries. We use a two-step approach to recognizing and measuring uncertain tax positions. The first step is to determine whether it is more-likely-than-not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement with a taxing authority. The calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of highly complex tax laws. Resolution of these uncertainties in a manner inconsistent with our expectations could have a material impact on our consolidated financial position, results of operations, and cash flows. We believe we have adequately provided for reasonably foreseeable outcomes in connection with the resolution of income tax uncertainties. However, our results have in the past, and could in the future, include favorable and unfavorable adjustments to our estimated tax liabilities in the period a determination of such estimated tax liability is made or resolved, upon the filing of an amended return, upon a change in facts, circumstances, or interpretation, or upon the expiration of a statute of limitation. Accordingly, our effective tax rate could fluctuate materially from period to period. Research and Development Research and development costs are expensed as incurred.

Net Income Per Share

Net Income Per Share	12 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income Per Share	2. Net Income Per Share The computation of basic and diluted net income per share for fiscal 2018, 2017, and 2016 was as follows (in millions, except per share amounts): 2018 2017 2016 Numerator: Net income $ (124.1 ) $ 48.8 $ 72.2 Denominator: Shares, basic 34.2 34.8 36.6 Effect of dilutive share-based awards - 0.8 1.3 Shares, diluted 34.2 35.6 37.9 Net income per share: Basic $ (3.63 ) $ 1.40 $ 1.97 Diluted $ (3.63 ) $ 1.37 $ 1.91 Diluted net income per share does not include the effect of potential common shares related to certain share-based awards for fiscal 2018, 2017, and 2016 as follows (in millions): 2018 2017 2016 Share-based awards 2.3 1.4 0.7 These share-based awards were not included in the computation of diluted net income per share because the proceeds received, if any, from such share-based awards combined with the average unamortized compensation costs, were greater than the average market price of our common stock, and therefore, their effect would have been antidilutive. Our basic net income per share amounts for each period presented have been computed using the weighted average number of shares of common stock outstanding. Our diluted net income per share amounts for each period presented include the weighted average effect of potentially dilutive shares. We used the “treasury stock” method to determine the dilutive effect of our stock options, DSUs, MSUs and PSUs.

Property and Equipment

Property and Equipment	12 Months Ended
	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	3. Property and Equipment Property and equipment as of the end of fiscal 2018 and 2017 consisted of the following (in millions): Life 2018 2017 Land — $ 13.3 $ 13.3 Building and building improvements Up to 35 years 51.8 47.9 Computer equipment 3 - 5 years 42.9 29.7 Manufacturing equipment 1 78.1 75.7 Furniture, fixtures, and leasehold improvements 3 - 10 years 24.1 21.5 Capitalized software 3 - 7 years 35.0 32.5 245.2 220.6 Accumulated depreciation and amortization (127.4 ) (106.8 ) Property and equipment, net $ 117.8 $ 113.8 In fiscal 2018 and 2017, there was $8.2 million and $10.8 million, respectively, of property and equipment retired which was fully amortized.

Acquisitions

Acquisitions	12 Months Ended
	Jun. 30, 2018
Business Combinations [Abstract]
Acquisitions	4. Acquisitions Conexant On June 11, 2017, we entered into a securities purchase agreement to acquire all of the outstanding limited liability company interests of Conexant Systems, LLC, or Conexant, a technology leader in voice and audio processing solutions for the smart home, or the Conexant presence in the smart home market and increase opportunities to grow revenue. Effective July 25, 2017, or the Conexant Closing Date, we completed the Conexant Acquisition for an initial purchase price of cash The acquisition has been accounted for using the purchase method of accounting in accordance with the business acquisition guidance. Under the purchase accounting method, the total estimated purchase consideration of the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets acquired and liabilities has been recorded as goodwill. Our estimate of the fair values of the acquired intangible assets at June 30, 2018, is based on established and accepted valuation techniques performed with the assistance of our third-party valuation specialists. The following table summarizes the amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the Conexant Closing Date (in millions): Cash $ 4.3 Accounts receivable 11.7 Inventory 51.0 Other current assets 3.5 Property and equipment 3.2 Acquired intangible assets 145.7 Other assets 0.9 Total identifiable assets acquired 220.3 Accounts payable 14.2 Accrued compensation 1.3 Other accrued liabilities 9.3 Other long-term liabilities 3.0 Net identifiable assets acquired 192.5 Goodwill 153.7 Net assets acquired $ 346.2 The estimate of the intangible assets as of June 30, 2018, totaling $145.7 million included the following: $104.9 million was allocated to developed technology and will amortize over an estimated weighted average useful life of 6 years; 38.4 million was allocated to customer relationships and will be amortized over an estimated useful life of 5 years; 1.8 million was allocated to trademarks and will be amortized over an estimated useful life of 7 years; $0.4 million was allocated to backlog and will be amortized over an estimated useful life of less than 1 year; and $0.2 million was allocated to in-process research and development which we will begin to amortize when the work is determined to be substantively complete and will be amortized over an estimated useful life to be determined at such time. Developed technology consists of semiconductor system solutions for audio and imaging applications. We estimated the fair value of the identified intangible assets using a discounted cash flow model for each of the underlying identified intangible assets. These fair value measurements were based on significant inputs not observable in the market and thus represent a Level 3 measurement. Key assumptions include the level and timing of expected future cash flows, conditions and demands specific to each intangible asset over its remaining useful life, and discount rates we believe to be consistent with the inherent risks associated with each type of asset, which range from 9% to 14%. The fair value of these intangible assets is primarily affected by the projected income and the anticipated timing of the projected income associated with each intangible asset coupled with the discount rates used to derive their estimated present values. We believe the level and timing of expected future cash flows appropriately reflects market participant assumptions. The value of goodwill reflects the anticipated synergies of the combined operations and workforce of Conexant as of the Conexant Closing Date. As of June 30, 2018, all of the goodwill is expected to be deductible for income tax purposes. Prior to the Conexant Acquisition, we did not have an existing relationship or transactions with Conexant. The condensed consolidated financial statements include approximately $116.5 million of revenue and approximately $ 37.0 Conexant The following unaudited pro forma financial information (in millions, except per share data) presents the combined results of operations for us and Conexant as if the Conexant Acquisition had occurred on June 30, 2016. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the Conexant Acquisition actually taken place on June 30, 2016 and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the Conexant Acquisition. 2018 2017 Revenue $ 1,638.4 $ 1,829.0 Net income/(loss) (124.4 ) 34.9 Net income/(loss) per share (3.64 ) 1.01 Pro forma adjustments used to arrive at pro forma net income for fiscal year 2018 and 2017 were as follows (in millions): 2018 2017 Buyer transaction costs $ 0.9 $ - Interest expense - (18.1 ) Intangible amortization (1.8 ) (23.7 ) Depreciation (0.5 ) (0.9 ) Income tax adjustment 0.4 15.0 Total $ (1.0 ) $ (27.7 ) Marvell Multimedia Solutions Business On June 11, 2017, the Company entered into an asset purchase agreement to acquire the assets of the multimedia solutions business of Marvell Technology Group Ltd., or Marvell, a leading provider of advanced video and audio processing applications for the smart home Marvell presence in the smart home market and increase opportunities to grow revenue. Effective September 8, 2017, or the Marvell Closing Date, we completed the Marvell Business Acquisition for a purchase price of cash The acquisition has been accounted for using the purchase method of accounting in accordance with the business acquisition guidance. Under the purchase accounting method, the total estimated purchase consideration of the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their relative fair values. The excess of the purchase consideration over the net tangible and identifiable intangible assets acquired and liabilities has been recorded as goodwill. Our estimate of the fair values of the acquired intangible assets at June 30, 2018, is based on established and accepted valuation techniques performed with the assistance of our third-party valuation specialists. The following table summarizes the amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the Marvell Business Acquisition date (in millions): Inventory $ 28.4 Property and equipment 5.0 Acquired intangible assets 48.7 Total identifiable assets acquired 82.1 Accrued liabilities 0.7 Net identifiable assets acquired 81.4 Goodwill 12.3 Net assets acquired $ 93.7 Of the $48.7 million of acquired intangible assets, $29.0 million was allocated to developed technology and will be amortized over an estimated weighted average useful life of 3.6 years; $15.1 million was allocated to customer relationships and will be amortized over an estimated useful life of 4 years, $0.1 million was allocated to backlog and will be amortized over an estimated useful life of less than 1 year; and $4.5 million was allocated to in-process research and development and will be amortized over an estimated useful life to be determined at the date the underlying projects are deemed to be substantively complete. Developed technology consists of semiconductor system solutions for advanced video and audio processing applications. We estimated the fair value of the identified intangible assets using a discounted cash flow model for each of the underlying identified intangible assets. These fair value measurements were based on significant inputs not observable in the market and thus represent a Level 3 measurement. Key assumptions include the level and timing of expected future cash flows, conditions and demands specific to each intangible asset over its remaining useful life, and discount rates we believe to be consistent with the inherent risks associated with each type of asset, which range from 14% to 32%. The fair value of these intangible assets is primarily affected by the projected income and the anticipated timing of the projected income associated with each intangible asset, coupled with the discount rates used to derive their estimated present values. We believe the level and timing of expected future cash flows appropriately reflects market participant assumptions. The value of goodwill reflects the anticipated synergies of the combined operations and workforce of the transferred Marvell Business assets as of the Marvell Closing Date. As of June 30, 2018, all of the goodwill is expected to be deductible for income tax purposes. Prior to the Marvell Business Acquisition, we did not have an existing relationship or transactions with Marvell. The condensed consolidated financial statements include approximately $138.0 million of revenue and approximately $14.1 million of operating loss from Marvell from the Marvell Closing Date through June 30, 2018. The following unaudited pro forma financial information (in millions, except per share data) presents the combined results of operations for us and Marvell as if the Marvell Business Acquisition had occurred on June 30, 2016. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the Marvell Business Acquisition actually taken place on June 30, 2016 and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the Marvell Business Acquisition. As the Marvell Business Acquisition was an asset acquisition and only a portion of Marvell’s multimedia solutions business was acquired, the unaudited pro forma financial information has been prepared using certain estimates. 2018 2017 Revenue $ 1,670.7 $ 1,793.6 Net income/(loss) (123.6 ) 27.7 Net income/(loss) per share (3.61 ) 0.82 Pro forma adjustments used to arrive at pro forma net loss for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Buyer transaction costs $ 1.1 $ - Interest expense - (19.6 ) Intangible amortization (2.3 ) (17.6 ) Income tax adjustment 0.3 13.0 Total $ (0.9 ) $ (24.2 )

Acquired Intangibles

Acquired Intangibles	12 Months Ended
	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Acquired Intangibles	5. Acquired Intangibles The following table summarizes the life, the gross carrying value of our acquired intangible assets, and the related accumulated amortization as of the end of fiscal 2018 and 2017 (in millions): Weighted Average 2018 2017 Life in Years Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Display driver technology 5.3 $ 164.0 $ (116.5 ) $ 47.5 $ 164.0 $ (84.9 ) $ 79.1 Audio and video technology 5.5 133.9 (22.8 ) 111.1 - - - Fingerprint authentication technology 4.0 55.7 (53.7 ) 2.0 63.5 (47.6 ) 15.9 Customer relationships 4.1 81.8 (38.5 ) 43.3 48.4 (46.0 ) 2.4 Licensed technology and other 4.3 9.0 (3.0 ) 6.0 1.3 (1.3 ) - Tradename 7.0 1.9 (0.2 ) 1.7 - - - Patents 7.7 4.6 (1.7 ) 2.9 4.8 (1.2 ) 3.6 Backlog 0.5 0.5 (0.5 ) - - - - In-process research and development Not applicable 4.7 - 4.7 - - - Acquired intangibles, gross 5.0 $ 456.1 $ (236.9 ) $ 219.2 $ 282.0 $ (181.0 ) $ 101.0 In fiscal 2018, there was $20.1 million of customer relationships, $4.3 million of fingerprint developed technology and $0.1 million patents retired which were fully depreciated. In fiscal 2017, there was $12.1 million of fingerprint developed technology and $22.0 million of supplier arrangements retired, which were fully depreciated. Amortization expense is calculated using the straight-line method over the estimated useful lives of the acquired intangibles. The total amortization expense for the acquired intangible assets was $83.9 million in fiscal 2018, $59.3 million in fiscal 2017, and $73.0 million in fiscal 2016. This amortization expense was included in our consolidated statements of operations as acquired intangibles amortization and cost of revenue. The following table presents expected annual aggregate amortization expense in future fiscal years (in millions): 2019 $ 74.0 2020 50.5 2021 36.5 2022 32.0 2023 19.5 Thereafter 2.0 To be determined 4.7 Future amortization $ 219.2

Debt

Debt	12 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Debt	6. Debt Convertible Debt On June 20, 2017, we entered into a purchase agreement, or the Purchase Agreement, with Wells Fargo Securities, LLC, as representative of the initial purchasers named therein, or collectively, the Initial Purchasers, pursuant to which we agreed to issue and sell, and the Initial Purchasers agreed to purchase, $500 million aggregate principal amount of our 0.50% convertible senior notes due 2022, or the Notes, in a private placement transaction. Pursuant to the Purchase Agreement, we also granted the Initial Purchasers a 30-day option to purchase up to an additional $25 million aggregate principal amount of Notes, which was exercised in full on June 21, 2017. The net proceeds, after deducting the Initial Purchasers’ discounts, were $514.5 million, which includes proceeds from the Initial Purchasers’ exercise of their option to purchase additional Notes. We received the net proceeds on June 26, 2017, which we used to repurchase 1,698,400 shares of our common stock, to retire our outstanding bank debt, and to provide additional cash resources to fund the Conexant and Marvell Business Acquisitions. The Notes bear interest at a rate of 0.50% per year. Interest accrued from June 26, 2017, and is payable semi-annually in arrears, on June 15 and December 15 of each year, beginning on December 15, 2017. The Notes are senior unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the Notes; equal in right of payment to any our liabilities that are not so subordinated; effectively junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness; and structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries. The Notes mature on June 15, 2022, or the Maturity Date, unless earlier repurchased, redeemed or converted. Holders may convert all or any portion of their Notes, in multiples of $1,000 principal amounts, at their option at any time prior to the close of business on the business day immediately preceding March 15, 2022 under certain defined circumstances. On or after March 15, 2022 until the close of business on the business day immediately preceding the Maturity Date, holders may convert all or any portion of their Notes, in multiples of $1,000 principal amounts, at the option of the holder. Upon conversion, we will pay or deliver, at our election, shares of common stock, cash, or a combination of cash and shares of common stock. The conversion rate for the Notes is initially 13.6947 shares of common stock per $1,000 principal amount of Notes (equivalent to an initial conversion price of approximately $73.02 per share of common stock). The conversion rate is subject to adjustment in certain circumstances. Upon the occurrence of a fundamental change (as defined in the Notes indenture), holders of the Notes may require us to repurchase for cash all or a portion of their Notes at a fundamental change repurchase price equal to 100% of the principal amount of the Notes to be repurchased, plus accrued and unpaid interest up to, but excluding, the fundamental change repurchase date. We may not redeem the Notes prior to June 20, 2020. We may redeem for cash all or any portion of the Notes, at our option, on or after June 20, 2020, if the last reported sale price of our common stock, as determined by us, has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest up to, but excluding, the redemption date. Our policy is to settle the principal amount of our Notes with cash upon conversion or redemption. As of the issuance date of the Notes, we recorded $82.1 million of the principal amount to equity, representing the debt discount for the difference between our estimated nonconvertible debt borrowing rate of 4.39% and the coupon rate of the Notes of 0.50% using a five-year life, which coincides with the term of the Notes. In addition, we allocated the total of $11.1 million of debt issuance costs, consisting of the Initial Purchaser’s discount of $10.5 million and legal, accounting, and printing costs of $579,000, pro rata, to the equity and debt components of the Notes, or $1.9 million and $9.2 million, respectively. The debt discount and the debt issuance costs allocated to the debt component are amortized as interest expense using the effective interest method over five years. The contractual interest expense and amortization of discount on the Notes for fiscal 2018, were as follows (in millions): Fiscal 2018 Interest expense $ 2.7 Amortization of discount and debt issuance costs 16.9 Total interest $ 19.6 The unamortized amounts of the debt issuance costs and discount associated with the Notes as of June 30, 2018, were $7.4 million and $66.8 million, respectively. Revolving Credit Facility and Term Loan Arrangement At the end of fiscal 2017, we had $220.0 million principal outstanding under our Credit Agreement consisting of $100.0 million under our revolving credit facility and $120.0 million under our term loan arrangement. At the beginning of fiscal 2018, we issued $525.0 million principal amount of convertible senior notes, or the Notes, and utilized a portion of the proceeds from our Notes to retire the outstanding principal and interest balances on our revolving credit facility and our term loan arrangement. At the end of July 2017, we made an election to reduce the commitment under the revolving credit facility from $450.0 million to $250.0 million as we were able to complete the Conexant Acquisition with available cash. In September 2017, we entered into an Amendment and Restatement Agreement, or the Agreement, with the lenders that are party thereto, or the Lenders, and Wells Fargo Bank, National Association, as administrative agent for the Lenders. The Agreement terminated our term loan arrangement and provides for a revolving credit facility in a principal amount of up to $200 million, which includes a $20 million sublimit for letters of credit and a $20 million sublimit for swingline loans. Under the terms of the Agreement, we may, subject to the satisfaction of certain conditions, request increases in the revolving credit facility commitments in an aggregate principal amount of up to $100 million to the extent existing or new lenders agree to provide such increased or additional commitments, as applicable. Proceeds under the revolving credit facility are available for working capital and general corporate purposes. As of June 30, 2018, there is no balance outstanding under the revolving credit facility. As a result of terminating our term loan arrangement, we expensed the remaining debt issuance costs attributable to the term loan of $1.0 million during the first quarter of fiscal 2018. The revolving credit facility is required to be repaid in full on the earlier of (i) September 27, 2022, and (ii) the date 91 days prior to the Maturity Date of the Notes if the Notes have not been refinanced in full by such date. Debt issuance costs of $2.3 million will be amortized over 60 months. Our obligations under the Agreement are guaranteed by the material domestic subsidiaries of our company, subject to certain exceptions (such material subsidiaries, together with our company, collectively, the Credit Parties). The obligations of the Credit Parties under the Agreement and the other loan documents delivered in connection therewith are secured by a first priority security interest in substantially all of the existing and future personal property of the Credit Parties, including, without limitation, 65% of the voting capital stock of certain of the Credit Parties’ direct foreign subsidiaries, subject to certain exceptions. The revolving credit facility bears interest at our election of a Base Rate plus an Applicable Margin or LIBOR plus an Applicable Margin. Swingline loans bear interest at a Base Rate plus an Applicable Margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The Applicable Margin is based on a sliding scale which ranges from 0.25 to 100 basis points for Base Rate loans and 100 basis points to 175 basis points for LIBOR loans. We are required to pay a commitment fee on any unused commitments under the Agreement which is determined on a leverage-based sliding scale ranging from 0.175% to 0.25% per annum. Interest and fees are payable on a quarterly basis. There is no balance outstanding under the revolving credit facility. Under the Agreement, there are various restrictive covenants, including financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, a restriction which places a limit on the amount of capital expenditures that may be made in any fiscal year, a restriction that permits up to $50 million per fiscal quarter of accounts receivable financings, and sets the Specified Leverage Ratio. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The current leverage ratio shall not exceed 3.50 to 1.00 provided that for the four fiscal quarters ending after the date of a material acquisition, such maximum leverage ratio shall be adjusted to 3.75 to 1.00, and thereafter, shall not be more than 3.50 to 1.00. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the Agreement. The Specified Leverage Ratio is the ratio used in determining, among other things, whether we are permitted to make dividends and/or prepay certain indebtedness, at a fixed ratio of 3.00 to 1.00. As of the end of the fiscal year, we were in compliance with the restrictive covenants.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies Leases We maintain office facilities in various locations under operating leases with expiration dates from fiscal 2019 to fiscal 2024, some of which have renewal options of one to five years. Our leased office facilities are located in Armenia, China, Denmark, Hong Kong, India, Japan, Korea, Switzerland, Taiwan, the United States, and Vietnam. We recognized rent expense on a straight-line basis of $12.0 million, $10.6 million, and $9.2 million for fiscal 2018, 2017, and 2016, respectively. The aggregate minimum rental commitments in future fiscal years for non-cancelable operating leases with initial or remaining terms in excess of one year were as follows (in millions): Operating Lease Fiscal Year Payments 2019 $ 6.0 2020 3.6 2021 1.6 2022 0.4 2023 0.3 Thereafter 0.1 Total minimum operating lease payments $ 12.0 Contingencies We have in the past and may in the future receive notices from third parties that claim our products infringe their intellectual property rights. We cannot be certain that our technologies and products do not and will not infringe issued patents or other proprietary rights of third parties. Any infringement claims, with or without merit, could result in significant litigation costs and diversion of management and financial resources, including the payment of damages, which could have a material adverse effect on our business, financial condition, and results of operations. Indemnifications In connection with certain agreements, we are obligated to indemnify the counterparty against third party claims alleging infringement of certain intellectual property rights by us. We have also entered into indemnification agreements with our officers and directors. Maximum potential future payments cannot be estimated because these agreements do not have a maximum stated liability. However, historical costs related to these indemnification provisions have not been significant. We have not recorded any liability in our consolidated financial statements for such indemnification obligations. Legal Proceedings In October 2015, Amkor Technology, or Amkor, filed a complaint against us alleging infringement of intellectual property rights and various other claims. In November 2015, we filed an indemnification claim against the former stockholders and option holders of Validity to secure our rights under the Agreement and Plan of Reorganization between us and Validity (the “Validity Agreement”). Pursuant to the Validity Agreement, we believe we can offset costs, damages and settlements incurred in connection with our defense and resolution of the complaint with Amkor against the contingent consideration earnout balance of $8.7 million and have classified the reserve balance as a current acquisition-related liability in our consolidated balance sheet. In April 2017, we agreed to settle this case with Amkor on undisclosed terms that include each party licensing and assigning certain intellectual property rights, and cash payments. Settlement costs incurred in connection with this litigation have been recorded in our consolidated financial statements and all but an immaterial amount was paid during fiscal 2017. The indemnification claim against the former stockholders and option holders of Validity remains outstanding.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Stockholders' Equity	8. Stockholders’ Equity Preferred Stock We are authorized, subject to limitations imposed by Delaware law, to issue up to a total of 10,000,000 shares of preferred stock in one or more series without stockholder approval. Our Board of Directors has the power to establish, from time to time, the number of shares to be included in each series and to fix the rights, preferences, and privileges of the shares of each wholly unissued series and any of its qualifications, limitations, or restrictions. Our Board of Directors can also increase or decrease the number of shares of a series, but not below the number of shares of that series then outstanding, without any further vote or action by the stockholders. Our Board of Directors may authorize the issuance of preferred stock with voting or conversion rights that could harm the voting power or other rights of the holders of our common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring, or preventing a change in control of our company and might harm the market price of our common stock and the voting power and other rights of the holders of our common stock. As of the end of fiscal 2018, there were no shares of preferred stock outstanding. Shares Reserved for Future Issuance Shares of common stock reserved for future issuance as of the end of fiscal 2018 were as follows: Stock options outstanding 1,618,209 Deferred stock units outstanding 1,853,558 Market stock units outstanding 354,726 Performance stock units outstanding 294,541 Awards available for grant under all share-based compensation plans 2,210,217 Reserved for future issuance 6,331,251 Treasury Stock Our cumulative authorization for our common stock repurchase program as of the end of fiscal 2018 is $1.3 billion, which expires in July 2019. The program authorizes us to repurchase our common stock in the open market or in privately negotiated transactions depending upon market conditions and other factors. The number of shares repurchased and the timing of repurchases is based on the level of our cash balances, general business and market conditions, and other factors, including alternative investment opportunities. Common stock repurchased under this program is held as treasury stock. As of the end of fiscal 2018, we had $226.1 million remaining under our common stock repurchase program.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	9. Share-Based Compensation The purpose of our various share-based compensation plans is to attract, motivate, retain, and reward high-quality employees, directors, and consultants by enabling such persons to acquire or increase their proprietary interest in our common stock in order to strengthen the mutuality of interests between such persons and our stockholders and to provide such persons with annual and long-term performance incentives to focus their best efforts on the creation of stockholder value. Consequently, we determine whether to grant share-based compensatory awards subsequent to the initial award for our employees and consultants primarily on individual performance. Our share-based compensation plans with outstanding awards consist of our Amended and Restated 2001 Incentive Compensation Plan, or our 2001 Plan; our Amended and Restated 2010 Incentive Compensation Plan, or our 2010 Plan; and our 2010 Employee Stock Purchase Plan, or our 2010 ESPP. Share-based compensation awards available for grant or issuance for each plan as of the beginning of the fiscal year, including changes in the balance of awards available for grant for fiscal 2018, were as follows: Awards 2010 Available 2001 2010 Employee Under All Incentive Incentive Stock Share-Based Compensation Compensation Purchase Award Plans Plan Plan Plan Balance at June 2017 2,947,069 — 2,566,899 380,170 Additional shares authorized 2,346,384 — 2,000,000 346,384 Stock options granted (61,825 ) — (61,825 ) — Deferred stock units granted (1,331,073 ) — (1,331,073 ) — Market stock units granted (300,071 ) — (300,071 ) — Performance stock units granted (315,380 ) — (315,380 ) — Market stock units performance adjustment 68,003 — 68,003 — Purchases under employee stock purchase plan (486,263 ) — — (486,263 ) Forfeited 692,035 4,500 687,535 — Plan shares expired (4,500 ) (4,500 ) — — Fungible Shares Ratio Adjustment (1,344,162 ) — (1,344,162 ) — Balance at June 2018 2,210,217 — 1,969,926 240,291 Our 2001 Plan, which expired in March 2011, was replaced by our 2010 Plan. Option awards that are currently outstanding under our 2001 Plan will remain outstanding until exercised, delivered, forfeited, or cancelled under the terms of their respective grant agreements. During the three months ended September 30, 2017, we adopted the accounting standard update, or ASU, for Compensation-Stock Compensation which was issued by the Financial Accounting Standards Board, or FASB. This update simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. Upon adoption of this ASU, we elected to change our accounting policy to account for forfeitures as they occur and we applied the accounting policy change on a modified retrospective basis. As a result of the adoption of this ASU, we recognized the net cumulative effect of this change as a $24.7 million increase to retained earnings, a $1.0 million increase to additional paid-in capital and established an additional $25.7 million of deferred tax assets for research credit and alternative minimum tax credit carryforwards. We have reflected excess tax benefits for share-based payments in the statement of cash flows as operating activities rather than financing activities on a prospective basis and therefore, prior periods have not been adjusted. Share-based compensation and the related tax benefit recognized in our consolidated statements of income for fiscal 2018, 2017, and 2016 were as follows (in millions): 2018 2017 2016 Cost of revenue $ 3.2 $ 2.2 $ 1.8 Research and development 38.6 33.1 30.6 Selling, general, and administrative 29.5 26.5 24.4 Total $ 71.3 $ 61.8 $ 56.8 Income tax benefit on share-based compensation $ 11.1 $ 16.1 $ 14.7 We recognize a tax benefit upon expensing certain share-based awards associated with our share-based compensation plans, including nonqualified stock options, DSUs, MSUs, and PSUs, but we cannot recognize a tax benefit concurrent with the recognition of share-based compensation expenses associated with incentive stock options and employee stock purchase plan shares (qualified stock awards). For qualified stock awards we recognize a tax benefit only in the period when disqualifying dispositions of the underlying stock occur, which historically has been up to several years after vesting and in a period when our stock price substantially increases. We determine excess tax benefit using the long-haul method in which we compare the actual tax benefit associated with the tax deduction from share-based award activity to the hypothetical tax benefit based on the grant date fair values of the corresponding share-based awards. Tax benefit associated with excess tax deduction creditable to income tax provision is recognized when incurred. Tax deficiency associated with a tax shortfall is debited to income tax provision when incurred. Historically, we have issued new shares in connection with our share-based compensation plans, however, treasury shares are also available for issuance. Any additional shares repurchased under our common stock repurchase program will be available for issuance under our share-based compensation plans. Stock Options Our share-based compensation plans with outstanding stock option awards include our 2001 Plan and our 2010 Plan. Under our 2010 Plan, we may grant incentive stock options or nonqualified stock options to purchase shares of our common stock at not less than 100% of the fair market value, or FMV, on the date of grant. Options granted under our 2010 Plan generally vest three to four years from the vesting commencement date and expire seven years after the date of grant if not exercised. Certain stock option activity for fiscal 2018 and balances as of the end of fiscal 2018 were as follows: Stock Weighted Option Average Intrinsic Awards Exercise Value Outstanding Price (In millions) Balance at June 2017 2,490,168 $ 49.20 Granted 61,825 45.32 Exercised (690,310 ) 24.08 Forfeited (105,124 ) 59.36 Expired (138,350 ) 72.08 Balance at June 2018 1,618,209 57.14 $ 9.2 Exercisable at June 2018 1,378,833 57.09 $ 8.9 The aggregate intrinsic value was determined using the closing price of our common stock on the last trading day of fiscal 2018, or June 29, 2018, of $50.37 and excludes the impact of options that were not in-the-money. Approximately 32% of the stock option awards outstanding were vested and in-the-money as of the end of fiscal 2018. At the end of fiscal 2018, we estimated that we have 1.6 million fully vested options with an aggregate intrinsic value of $9.2 million, having a weighted average exercise price of $57.14 and a weighted average remaining contractual term of 3.31 years. The weighted average remaining contractual term for the options exercisable is approximately 2.96 years. Cash received and the aggregate intrinsic value of stock options exercised for fiscal 2018, 2017, and 2016 were as follows (in millions): 2018 2017 2016 Cash received $ 16.7 $ 10.7 $ 16.6 Aggregate intrinsic value $ 15.2 $ 12.3 $ 29.7 The fair value of each award granted under our share-based compensation plans for fiscal 2018, 2017, and 2016 was estimated at the date of grant using the Black-Scholes option pricing model, assuming no expected dividends and the following range of assumptions: 2018 2017 2016 Expected volatility 46.2% 45.2% - 48.3% 40.4% - Expected life in years 4.4 3.8 3.8 Risk-free interest rate 1.8% 1.03% - 1.94% 1.22% - 1.72% Fair value per award $ 18.04 $ 21.08 $ 28.30 The unrecognized share-based compensation costs for stock options granted under our various plans were approximately $4.3 million as of the end of fiscal 2018, to be recognized over a weighted average period of approximately 1.43 years. Deferred Stock Units Our 2010 Plan provides for the grant of DSU awards to our employees, consultants, and directors. A DSU is a promise to deliver shares of our common stock at a future date in accordance with the terms of the DSU grant agreement. We began granting DSUs in January 2006. DSUs granted under our 2010 Plan generally vest ratably over three to four years from the vesting commencement date. Delivery of shares under the plan takes place on the quarterly vesting dates. At the delivery date, we withhold shares to cover statutory minimum tax withholding by delivering a net quantity of shares. Until delivery of shares, the grantee has no rights as a stockholder. An election to defer delivery of the underlying shares for unvested DSUs can be made by the grantee provided the deferral election is made at least one year before vesting and the deferral period is at least five years from the scheduled delivery date. DSU activity, including DSUs granted, delivered, and forfeited in fiscal 2018, and the balance and aggregate intrinsic value of DSUs as of the end of fiscal 2018 were as follows: Aggregate Weighted Intrinsic Average DSU Awards Value Grant Date Outstanding (in millions) Fair Value Balance at June 30, 2017 1,320,798 $ 69.14 Granted 1,331,073 40.52 Delivered (545,028 ) 70.26 Forfeited (253,285 ) 58.42 Balance at June 30, 2018 1,853,558 $ 93.4 49.75 Of the shares delivered, 138,499 shares valued at $5.4 million were withheld to meet statutory minimum tax withholding requirements. The aggregate intrinsic value was determined using the closing price of our common stock on the last trading day of fiscal 2018, or June 29, 2018, of $50.37. The unrecognized share-based compensation cost for DSUs granted under our 2010 Plan was approximately $108.1 million as of the end of fiscal 2018, which will be recognized over a weighted average period of approximately 2.03 years. The aggregate market value of DSUs delivered in fiscal 2018, 2017, and 2016 was $21.4 million, $24.3 million, and $26.7 million, respectively. Market Stock Units Our Amended and Restated 2010 Incentive Compensation Plan provides for the grant of MSU awards, to our employees, consultants, and directors. An MSU is a promise to deliver shares of our common stock at a future date based on the achievement of market-based performance requirements in accordance with the terms of the MSU grant agreement. We have granted MSUs to our executive officers and other management members, which are designed to vest in three tranches with the target quantity for each tranche equal to one-third of the total MSU grant. The first tranche vests based on a one-year performance period; the second tranche vests based on a two-year performance period; and the third tranche vests based on a three-year performance period. Performance is measured based on the achievement of a specified level of total stockholder return, or TSR, relative to the TSR of the S&P Semiconductor Select Industry Index, or SPSISC Index, for grants made beginning in fiscal 2018 and relative to the Philadelphia Semiconductor Index, or SOX Index, for grants made prior to fiscal 2018. The potential payout ranges from 0% to 200% of the grant target quantity and is adjusted on a two-to-one ratio based on our TSR performance relative to the SPSISC Index TSR or SOX Index TSR using the following formula: (100% + ([Synaptics TSR—{SPSISC Index TSR or SOX Index TSR}] x 2)) The payout for tranche one and two will not exceed 100% and the payout for tranche three will be calculated based on the total target quantity for the entire grant multiplied by the payout factor, based on performance for the three-year performance period, less shares issued for the first tranche and the second tranche. Delivery of shares earned, if any, will take place on the dates provided in the applicable MSU grant agreement, assuming the grantee is still an employee, consultant, or director of our company at the end of the applicable performance period. On the delivery date, we withhold shares to cover statutory tax withholding requirements and deliver a net quantity of shares to the employee, consultant, or director after such withholding. Until delivery of shares, the grantee has no rights as a stockholder with respect to any shares underlying the MSU award. MSU activity, including MSUs granted, delivered, and forfeited in fiscal 2018, and the balance and aggregate intrinsic value of MSUs as of the end of fiscal 2018 were as follows: Aggregate Weighted Intrinsic Average MSU Awards Value Grant Date Outstanding (in millions) Fair Value Balance at June 30, 2017 158,596 $ 82.88 Granted 300,071 53.02 Performance adjustment (68,003 ) — Delivered — — Forfeited (35,938 ) 76.93 Balance at June 30, 2018 354,726 $ 17.9 59.37 As a result of the Synaptics TSR underperforming the SOX Index TSR by 118 percentage points, we did not deliver any of the targeted shares underlying the October 2014 MSU grants. As a result of the Synaptics TSR underperforming the SOX Index TSR by 115 percentage points, we did not deliver any of the targeted shares underlying the October 2015 MSU grants. As a result of the Synaptics TSR underperforming the SOX Index TSR by 60 percentage points, we did not deliver any of the targeted shares underlying the October 2016 MSU grants The aggregate intrinsic value assumes a 100% payout factor and was determined using the closing price of our common stock on the last trading day of fiscal 2018, or June 29, 2018, of $50.37. The fair value of each MSU granted from our plans for fiscal 2018, 2017, and 2016 was estimated at the date of grant using the Monte Carlo simulation model, assuming no expected dividends and the following assumptions: 2018 2017 2016 Expected volatility of company 49.16% - 50.60% 52.54 % 45.57 % Expected volatility of SOX index 22.37% - 22.52% 21.23 % 19.65 % Correlation coefficient 0.52 - 0.53 0.45 0.42 Expected life in years 2.80 - 2.92 2.92 2.94 Risk-free interest rate 1.72% - 1.88% 1.01 % 0.92 % Fair value per award $48.22 - $59.19 $ 67.51 $ 126.74 We amortize the compensation expense over the three-year performance and service period. The unrecognized share-based compensation cost of our outstanding MSUs was approximately $14.4 million as of the end of fiscal 2018, which will be recognized over a weighted average period of approximately 1.12 years. Performance Stock Units Our Amended and Restated 2010 Incentive Compensation Plan provides for the grant of PSU awards to our employees, consultants, and directors. A PSU is a promise to deliver shares of our common stock at a future date based on the achievement of performance-based requirements in accordance with the terms of the PSU grant agreement. We have granted PSUs to our executive officers and other management members, which are designed to vest in three tranches with the target quantity for each tranche equal to one-third of the total PSU grant. The grants have a specific one-year performance period and vesting occurs over three service periods with the final service period ending approximately three years from the grant date. Performance is measured based on the achievement of a specified level of non-GAAP earnings per share. The potential payout ranges from 0% to 200% of the grant target quantity and is adjusted on a linear basis with a payout triggering if our non-GAAP earnings per share equals greater than 65% of the target with a maximum payout achieved at 135% of target. Delivery of shares earned, if any, will take place on the dates provided in the applicable PSU grant agreement, assuming the grantee is still an employee, consultant, or director of our company at the end of the applicable service period. On the delivery date, we withhold shares to cover statutory tax withholding requirements and deliver a net quantity of shares to the employee, consultant, or director after such withholding. Until delivery of shares, the grantee has no rights as a stockholder with respect to any shares underlying the PSU award. During the fiscal year ended June 30, 2018, there were 315,380 PSUs granted, 20,839 PSUs forfeited, and no PSUs were delivered. The aggregate intrinsic value of all outstanding PSUs as of June 30, 2018, was $14.8 million. We value PSUs using the aggregate intrinsic value on the date of grant and amortize the compensation expense over the three-year service period on a ratable basis, dependent upon the probability of meeting the performance measures. The unrecognized share-based compensation cost of our outstanding PSUs was approximately $7.7 million as of June 30, 2018, which will be recognized over a weighted average period of approximately 1.42 years. Employee Stock Purchase Plan Our 2010 Employee Stock Purchase Plan, or ESPP, became effective on January 1, 2011. The 2010 ESPP allows employees to designate up to 15% of their base compensation, subject to legal restrictions and limitations, to purchase shares of common stock at 85% of the lesser of the FMV at the beginning of the offering period or the exercise date. The offering period extends for up to two years and includes four exercise dates occurring at six-month intervals. Under the terms of our 2010 ESPP, if the FMV at an exercise date is less than the FMV at the beginning of the offering period, the current offering period will terminate and a new two-year offering period will commence. Shares purchased, weighted average purchase price, cash received, and the aggregate intrinsic value for employee stock purchase plan purchases in fiscal 2018, 2017, and 2016 were as follows (in millions, except shares purchased and weighted average purchase price): 2018 2017 2016 Shares purchased 486,263 302,085 302,781 Weighted average purchase price $ 32.07 $ 46.74 $ 52.42 Cash received $ 15.6 $ 14.1 $ 15.8 Aggregate intrinsic value $ 3.9 $ 2.7 $ 7.0 The fair value of each award granted under our 2010 ESPP for fiscal 2018, 2017, and 2016 was estimated using the Black-Scholes option pricing model, assuming no expected dividends and the following range of assumptions: 2018 2017 2016 Expected volatility 43.7 - 49.8% 38.4 - 54.9% 37.4% - 40.6% Expected life in years 0.5 - 2.0 0.5 - 2.0 0.5 - 1.0 Risk-free interest rate 1.42% - 2.45% 0.62% - 1.20% 0.33% - 0.54% Fair value per award $ 13.54 $ 20.44 $ 24.52 The expected volatility is based on either implied volatility for the expected lives of 0.5 years or a weighting of implied and historical volatility for expected lives greater than 0.5 years; the expected life is the period starting at the enrollment date until each purchase date remaining in the offering period at the date of enrollment in the plan; and the risk free interest rate is based on U.S. Treasury yields or yield curve in effect for each expected life. Unrecognized share-based compensation costs for awards granted under our 2010 ESPP at the end of fiscal 2018 were approximately $12.9 million that will be amortized over the next 16 months.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Jun. 30, 2018
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	10. Employee Benefit Plans 401(k) Plan We have a 401(k) Retirement Savings Plan for full-time employees in the United States. Under the plan, eligible employees may contribute a portion of their net compensation up to the annual limit of $18,500, or $24,500 for employees who are 50 years or older. In fiscal 2018, we provided matching funds of 25% of our employees’ contributions, excluding catch-up contributions. The employer matching funds vest 25% over four years and are fully vested at the end of the fourth year. We made matching contributions of $2.8 million, $2.3 million, and $2.5 million in fiscal 2018, 2017, and 2016, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes On December 22, 2017, the U.S. government enacted comprehensive tax legislation, commonly known as the Tax Cuts and Jobs Act of 2017, or the Act, which significantly reforms the Internal Revenue Code of 1986, as amended. The Act contains broad and complex changes to corporate taxation, including, in part, reduction of the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously considered permanently reinvested, and creates new taxes on certain foreign sourced earnings. As our accounting and tax year is the fiscal period ending on the last Saturday in June, U.S. federal tax law requires that taxpayers with a fiscal year that spans the effective date of a rate change to calculate a blended tax rate based on the pro rata number of days in the fiscal year before and after the effective date. As a result, our U.S. federal tax rate for fiscal 2018 is a days-weighted blended tax rate of 28.17%. For fiscal 2019 and subsequent tax years, our U.S. federal tax rate will be 21%. As of June 30, 2018, we have not finalized our accounting for the tax impact of the Act; however, in certain cases, we have made a reasonable estimate of the impact of the enactment. In cases where we have not been able to make a reasonable estimate, we continue to account for those items based on our existing accounting policies. For those items in which we could determine a reasonable estimate, namely the one-time transition tax and the remeasurement of deferred tax at the new tax rate, we recognized provisional tax expense of $41.4 million, of which an expense of $44.1 million relates to one-time transition tax and a benefit of $2.7 million related to remeasurement of deferred tax at the new tax rate. The one-time transition tax is based on our post-1986 foreign earnings and profits, or E&P, which we have previously excluded from U.S. income taxes due to our position that we would permanently reinvest future earnings. The one-time transition tax is applied at a 15.5% tax rate on cash assets and an 8% tax rate for other specified assets. We recorded a provisional amount for our one-time transition tax liability for our foreign subsidiaries and investments, resulting in an increase in income tax liability of $11.6 million, net of foreign tax credits and research credits. We have not yet completed our calculation of the total post-1986 foreign E&P for these foreign subsidiaries. This amount may change when we finalize the determination of our E&P previously deferred from U.S. federal taxation and finalize the amounts held in cash or other specified assets. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax and any additional outside basis difference inherent in these entities as these amounts continue to be indefinitely reinvested in foreign operations. We do not have the necessary information prepared or analyzed to develop a reasonable estimate of the tax liability, if any, for our remaining outside basis difference including any deferred tax accounting that may be required due to other provisions in the Act beyond the one-time transition tax and the remeasurement of deferred tax under the new tax rate, including how that accounting may be affected by our ongoing accounting position to indefinitely reinvest unremitted foreign earnings. Income/(loss) before provision for income taxes for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 United States $ (51.1 ) $ (10.1 ) $ 12.3 Foreign (30.7 ) 71.4 63.3 Income/(loss) before provision for income taxes $ (81.8 ) $ 61.3 $ 75.6 The provision for income taxes for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Current tax expense Federal $ 21.5 $ 9.6 $ 12.1 Foreign 14.1 25.5 12.4 35.6 35.1 24.5 Deferred tax expense/(benefit) Federal 14.4 (10.6 ) (7.5 ) Foreign (9.5 ) (12.3 ) (13.6 ) 4.9 (22.9 ) (21.1 ) Provision for income taxes $ 40.5 $ 12.2 $ 3.4 The provision for income taxes differs from the federal statutory rate for fiscal 2018, 2017, and 2016 as follows (in millions): 2018 2017 2016 Provision at U.S. federal statutory rate $ (22.9 ) $ 21.5 $ 26.6 Qualified stock options 4.9 5.5 5.1 Shortfall related to share-based compensation 4.1 — — Business credits (4.9 ) (3.6 ) (10.3 ) Foreign tax differential 16.5 (13.2 ) (22.4 ) Non-deductible portion of contingent consideration — 0.9 0.9 Change in valuation allowance — (0.8 ) (1.4 ) Nondeductible amortization 1.2 1.6 4.4 Taxes associated with one-time transition tax 44.1 — — Impact of corporate tax rate change on deferred taxes (2.7 ) — — Other differences 0.2 0.3 0.5 Provision for income taxes $ 40.5 $ 12.2 $ 3.4 Net deferred tax assets were all non-current, which were included in other assets in the accompanying consolidated balance sheets as of the end of fiscal 2018 and 2017, and consisted of $15.9 million and $23.1 million, respectively. Significant components of our deferred tax assets (liabilities) as of the end of fiscal 2018 and 2017 consisted of the following (in millions): 2018 2017 Deferred tax assets: Investment writedowns $ 1.1 $ 1.8 Inventory writedowns 11.6 7.4 Property and equipment 1.9 3.0 Accrued compensation 0.1 0.2 Deferred compensation 0.6 1.9 Share-based compensation 11.1 15.6 Business credit carryforward 25.3 19.2 Net operating loss carryforward — 0.3 Acquisition intangibles 0.6 — Other accruals 1.6 2.0 53.9 51.4 Valuation allowance (23.3 ) (15.8 ) 30.6 35.6 Deferred tax liabilities: Acquisition intangibles — (9.2 ) Interest (14.7 ) (3.3 ) (14.7 ) (12.5 ) Net deferred tax assets $ 15.9 $ 23.1 Realization of deferred tax assets depends on our generating sufficient U.S. and certain foreign taxable income in future years to obtain a benefit from the utilization of those deferred tax assets on our tax returns. Accordingly, the amount of deferred tax assets considered realizable may increase or decrease when we reevaluate the underlying basis for our estimates of future U.S. and foreign taxable income. As of the end of fiscal 2018, a valuation allowance of $23.3 million is maintained to reduce deferred tax assets to levels that we believe are more likely than not to be realized through future taxable income. The net change in the valuation allowance during fiscal 2018 was an increase of $7.5 million. Undistributed earnings of our foreign subsidiaries were approximately $751.9 million as of the end of fiscal 2018, which we have accounted for in the one-time transition tax calculation; accordingly, no additional U.S. income taxes have been provided for these earnings. As of the end of fiscal 2018, we had federal and California net operating loss carryforwards of approximately $0.1 million and $33.2 million, respectively. The California net operating loss will begin to expire in fiscal 2020, if not utilized. Under current tax law, net operating loss and tax credit carryforwards available to offset future income or income taxes may be limited by statute or upon the occurrence of certain events, including significant changes in ownership. We had $7.0 million and $34.1 million of federal and state research tax credit carryforwards, respectively, as of the end of fiscal 2018. The federal research tax credit carryforward will begin to expire in 2032 and the state research tax credit can be carried forward indefinitely. We also had $1.6 million of federal alternative minimum tax credit carryforward available to offset future federal tax liabilities with no expiration or potentially refundable under current tax laws. The total liability for gross unrecognized tax benefits related to uncertain tax positions, included in other liabilities in our consolidated balance sheets, increased by $9.6 million from $15.2 million in fiscal 2017 to $24.8 million in fiscal 2018. Of this amount, $17.5 million will reduce the effective tax rate on income from continuing operations, if recognized. A reconciliation of the beginning and ending balance of gross unrecognized tax benefits for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Beginning balance $ 15.2 $ 13.4 $ 11.6 Increase in unrecognized tax benefits related to current year tax positions 10.5 2.5 1.6 Increase in unrecognized tax benefits related to prior year tax positions — 0.1 1.1 Decrease due to statute expiration (0.9 ) (0.8 ) (0.9 ) Ending Balance $ 24.8 $ 15.2 $ 13.4 Accrued interest and penalties increased by $0.7 million, decreased by $0.2 million, and increased by $0.3 million representing income tax expense or benefit, in fiscal 2018, 2017, and 2016, respectively. Accrued interest and penalties were $1.9 million and $1.2 million as of June 30, 2018 and 2017, respectively. Our policy is to classify interest and penalties, if any, as components of income tax expense. It is reasonably possible that the amount of liability for unrecognized tax benefits may change within the next 12 months; an estimate of the range of possible changes could result in a decrease of $1.9 million to an increase of $3.2 million. In July 2018, the U.S. Ninth Circuit Court of Appeals reversed a 2015 decision of the U.S. Tax Court in Altera Corp. v. Commissioner that found that the Treasury regulations addressing the treatment of stock-based compensation in a cost-sharing arrangement with a related party were invalid. In August 2018, the U.S. Ninth Circuit Court of Appeals withdrew its July 2018 opinion to allow time for the reconstituted panel to confer on this appeal. As our tax filing position is consistent with the treasury regulations, we determined no adjustment to our financial statements is required, however, due to the uncertainties with respect to the ultimate resolution, we will continue to monitor developments in this case. Our major tax jurisdictions are the United States, Hong Kong SAR, and Japan. From fiscal 2013 onward, we remain subject to examination by one or more of these jurisdictions. We are currently under an income tax examination by the IRS for fiscal years 2014 and 2015. The audit is ongoing and as of June 30, 2018, we have not received any proposed adjustments. During the three months ended September 30, 2017, we early adopted the new ASU on Income Taxes: Intra-Entity Transfers of Assets Other Than Inventory, which reduces the complexity in the accounting standards by allowing the recognition of current and deferred income taxes for an intra-entity asset transfer, other than inventory, when the transfer occurs. Historically, recognition of the income tax consequence of an intra-entity asset transfer was deferred and recognized either upon the disposition of the asset or over the economic life of the asset. We applied this amendment on a modified retrospective basis through a cumulative-effect adjustment of $8.3 million directly to retained earnings as of the beginning of fiscal 2018.

Segment, Customers, and Geograp

Segment, Customers, and Geographic Information	12 Months Ended
	Jun. 30, 2018
Segment Reporting [Abstract]
Segment, Customers, and Geographic Information	12. Segment, Customers, and Geographic Information We operate in one segment: the development, marketing, and sale of semiconductor products used in electronic devices and products. We generate our revenue from three broad product categories: the mobile product market, the personal computing, or PC, product market, and the Internet of Things, or IoT, product market. Net revenue within geographic areas based on our customers’ locations for fiscal 2018, 2017, and 2016, consisted of the following (in millions): 2018 2017 2016 China $ 803.2 $ 844.8 $ 518.7 Japan 358.6 426.5 651.0 Taiwan 235.2 66.4 61.1 United States 90.9 231.4 249.1 Other 74.9 25.3 4.5 South Korea 67.5 123.8 182.5 $ 1,630.3 $ 1,718.2 $ 1,666.9 Net revenue from external customers for each group of similar products for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Mobile product applications $ 1,021.0 $ 1,406.0 $ 1,398.2 PC product applications 257.8 229.2 207.4 IoT product applications 351.5 83.0 61.3 $ 1,630.3 $ 1,718.2 $ 1,666.9 As a result of our recent acquisitions, we are presenting a new revenue line for IoT. Certain reclassifications have been made to the prior year revenue presentation in the above table in order to conform to the current year revenue presentation. Long-lived assets within geographic areas as of the end of fiscal 2018 and 2017 consisted of the following (in millions): 2018 2017 United States $ 193.3 $ 159.4 Asia/Pacific 273.8 262.2 Europe 242.7 - $ 709.8 $ 421.6 Our goodwill of $372.8 million has been allocated to two reporting units which include IoT and Mobile/PC. Major customers’ revenue as a percentage of total net revenue for fiscal 2018, 2017, and 2016 were as follows: 2018 2017 2016 Customer A 15% 24% 20% Customer B 12% * * Customer C * 19% 21% Customer D * 10% * Customer E * * 15% _____________ * Less than 10%

Restructuring Activities

Restructuring Activities	12 Months Ended
	Jun. 30, 2018
Restructuring And Related Activities [Abstract]
Restructuring Activities	13. Restructuring Activities In November 2017, we committed to and initiated a restructuring action intended to streamline and reduce our operating cost structure and capitalize on acquisition synergies. These costs primarily related to severance costs for a reduction in headcount, facility consolidation and related costs. In April 2018, we committed to and initiated a restructuring to close a research and development facility. These costs include employee severance and related benefits and facility closure charges. Restructuring costs related to both the November 2017 and April 2018 restructuring activities were recorded to the restructuring costs line item within our condensed consolidated statements of operations and are complete as of June 30, 2018. The restructuring liability activities during fiscal year 2018 were as follows (in millions): Employee Severance Facility Consolidation and Benefits and Related Charges Total Accruals $ 11.0 $ 1.0 $ 12.0 Cash payments (8.8 ) (0.2 ) (9.0 ) Non-cash settlements - (0.7 ) (0.7 ) Balance as of June 30, 2018 $ 2.2 $ 0.1 $ 2.3 In June 2016, our management committed to and initiated plans to restructure and further improve efficiencies in our operational activities to align the Company’s cost structure consistent with its revenue levels. Restructuring costs related to the June 2016 restructuring activities were recorded to the restructuring costs line item within our consolidated statements of income. These costs primarily related to severance costs for a reduction in headcount and facility consolidation and related costs. These restructuring charges were complete as of June 30, 2017. The restructuring liability activities during fiscal 2018, 2017, and 2016 were as follows (millions): Employee Severance Facility Consolidation and Benefits and Related Charges Total Balance as of June 30, 2015 $ - $ - $ - Accruals 6.7 6.7 Balance as of June 30, 2016 6.7 - 6.7 Additional accruals 5.0 2.3 7.3 Cash payments (11.7 ) (0.9 ) (12.6 ) Non-cash settlements - (0.8 ) (0.8 ) Balance as of June 30, 2017 - 0.6 0.6 Adjustments - (0.2 ) (0.2 ) Cash payments - (0.4 ) (0.4 ) Balance as of June 30, 2018 $ - $ - $ - In the first quarter of fiscal 2016, we recorded $1.9 million of restructuring costs in our consolidated statements of income. The costs included severance costs related to restructuring of the operations related to our acquisition of RSP.

Subsequent Event

Subsequent Event	12 Months Ended
	Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Event	14. Subsequent Event In August 2018, we committed to and initiated a restructuring of our mobile fingerprint optical business. We estimate the costs to be $8.0 million to $10.0 million and expect the activities to be substantially complete by the end of the second quarter of fiscal 2019. Estimated costs include employee severance and related benefits.

Organization and Summary of S22

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation We are a leading worldwide developer and supplier of custom-designed human interface semiconductor product solutions that enable people to interact more easily and intuitively with a wide variety of mobile computing, communications, entertainment, and other electronic devices. We currently generate revenue from the markets for smartphones, tablets, personal computer, or PC, products, primarily notebook computers, Internet of Things, or IoT, which includes devices with voice, speech and video within smart homes, and other select electronic devices, including devices in automobiles, with our custom human interface solutions. Every solution we deliver either contains or consists of our touch-, display driver-, fingerprint authentication-based-, voice and speech-, or video-semiconductor solutions, which include our chip, customer-specific firmware, and software. Our original equipment manufacturer, or OEM, customers include many of the world’s largest OEMs for smartphones, most of the world’s largest PC OEMs, and many large OEMs for voice- speech and video products. The consolidated financial statements are presented in accordance with U.S. generally accepted accounting principles, or U.S. GAAP, and include our financial statements and those of our wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated upon consolidation. Our fiscal year is the 52- or 53-week period ending on the last Saturday in June. The fiscal years presented in this report were a 53-week period ended June 30, 2018, and 52-week periods ended June 24, 2017 and June 25, 2016. For simplicity, the accompanying consolidated financial statements have been shown as ending on calendar year end dates as of and for all periods presented, unless otherwise indicated.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to revenue, allowance for doubtful accounts, cost of revenue, inventories, loss on purchase commitments, product warranty, accrued liabilities, share-based compensation costs, provision for income taxes, deferred income tax asset valuation allowances, uncertain tax positions, goodwill, intangible assets, investments, contingent consideration liability and loss contingencies. We base our estimates on historical experience, applicable laws and regulations, and various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Cash Equivalents and Investments	Cash Equivalents and Investments Cash equivalents consist of highly liquid investments with original maturities of three months or less. Our non-current investments, which are included in non-current other assets in the consolidated balance sheets, consist of ARS investments and are reported at fair value, with unrealized gains and losses excluded from earnings and shown separately as a component of accumulated other comprehensive income within stockholders’ equity. We charge other-than-temporary declines in the fair value of a debt security to earnings if the decline is due to a credit loss or if we intend to or need to sell at a loss, resulting in the establishment of a new cost basis in the debt security. We charge other-than-temporary declines in the fair value of a debt security to other comprehensive income if the decline is due to a noncredit loss. We charge other-than-temporary declines in the fair value of an equity security to earnings. We include interest earned and accretion on securities in interest income. We determine realized gains and losses on the sale of securities using the specific identification method. Our cash equivalents and investments classified as available-for-sale securities as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 275.2 $ — $ 275.2 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 275.2 $ 1.5 $ 276.7 2017 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 361.7 $ — $ 361.7 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 361.7 $ 1.5 $ 363.2
Fair Value	Fair Value We measure certain financial assets and liabilities at fair value. When we measure fair value on either a recurring or nonrecurring basis, inputs used in valuation techniques are assigned a hierarchical level as follows: • Level 1 inputs are observable inputs that reflect quoted prices for identical assets or liabilities in active markets. • Level 2 inputs reflect quoted prices for identical assets or liabilities in markets that are not active; quoted prices for similar assets or liabilities in active markets; inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3 inputs are unobservable inputs reflecting our assumptions, which are incorporated into valuation techniques and models used to determine fair value. The assumptions are consistent with market participant assumptions that are reasonably available. Financial assets measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Money market $ 275.2 $ — $ — $ 361.7 $ — $ — Auction rate securities — — 1.5 — — 1.5 Total available-for-sale securities $ 275.2 $ — $ 1.5 $ 361.7 $ — $ 1.5 In connection with the acquisition of Validity Sensors, Inc., or Validity, we entered into a contingent consideration arrangement. As of June 30, 2018, the balance of $8.7 million represents a contractual liability which is no longer subject to valuation as the carrying amount approximates the fair value. The balance represents amounts we have not paid and have retained, subject to resolution of matters related to the Amkor Technology legal dispute (see Legal Proceedings under Note 7 Commitments and Contingencies). Changes in fair value of our Level 3 financial assets for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 1.5 $ 8.6 Net unrealized loss - (1.5 ) Impairment recovery on redeemed investments - 1.9 Redemptions - (7.5 ) Ending balance $ 1.5 $ 1.5 There were no transfers in or out of our Level 1, 2 or 3 assets during fiscal 2018 or 2017. The fair values of our accounts receivable and accounts payable approximate their carrying values because of the short-term nature of those instruments. Intangible assets, property and equipment, and goodwill are measured at fair value on a non-recurring basis if impairment is indicated. The interest rate on our bank debt is variable, which is subject to change from time to time to reflect a market interest rate; accordingly, the carrying value of our bank debt approximates fair value.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash equivalents, investments, and accounts receivable. Our investment policy, which is predicated on capital preservation and liquidity, limits investments to U.S. government treasuries and agency issues, taxable securities, and municipal issued securities with a minimum rating of A1 (Moody’s) or P1 (Standard and Poor’s) or their equivalent. Included within our investment portfolio are investments in ARS investments, which met our investment guidelines at the time of investment. Our ARS investments are currently not liquid as a result of continued auction failures. We sell our products to contract manufacturers that provide manufacturing services for OEMs, and to some OEMs directly. We extend credit based on an evaluation of a customer’s financial condition, and we generally do not require collateral. The following customers accounted for more than 10% of our accounts receivable balance as of the end of fiscal 2018 and 2017: 2018 2017 Customer A 13% 13% Customer B 11% 17% Customer C 10% 15% * Less than 10%
Other Concentrations	Other Concentrations Our products include certain components that are currently single sourced. We believe other vendors would be able to provide similar components, however, the qualification of such vendors may require extra lead time. In order to mitigate any adverse impacts from a disruption of supply, we strive to maintain an adequate supply of critical single-sourced components.
Revenue Recognition	Revenue Recognition We recognize revenue from product sales when there is persuasive evidence that an arrangement exists, delivery has occurred, and title has transferred, the price is fixed or determinable, and collection is reasonably assured. We accrue for estimated sales returns, incentives and other allowances at the time we recognize revenue. Our products contain embedded firmware and software, which together with, or consisting of, our ASIC chip, deliver the essential functionality of our products and, as such, software revenue recognition guidance is not applicable to our products. The majority of our sales to distributors are made under agreements that generally do not provide for price adjustments after purchase and revenue recognition and provide for only limited return rights under product warranty. Revenue on these sales is recognized in the same manner as sales to our non-distributor customers. Some of our sales are to distributors which have limited stock rotation rights, which allow them to rotate a small portion of product in their inventory a maximum of two times per year. When sales rebates, price allowances or stock rotations are applicable, they are estimated and recorded in the period the related revenue is recognized.
Advertising Costs	Advertising Costs Advertising costs, if any, are expensed when incurred.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts We maintain allowances for doubtful accounts for estimated losses resulting from the inability of customers to meet their financial obligations. On an ongoing basis, we evaluate the collectability of accounts receivable based on a combination of factors. In circumstances in which we are aware of a specific customer’s potential inability to meet its financial obligation, we record a specific reserve of the bad debt against amounts due. In addition, we make judgments and estimates on the collectability of accounts receivable based on our historical bad debt experience, customers’ creditworthiness, current economic trends, recent changes in customers’ payment trends, and deterioration in customers’ operating results or financial position. If circumstances change adversely, additional bad debt allowances may be required. For all periods presented, credit losses on our accounts receivable have been insignificant, and we believe that an adequate allowance for doubtful accounts has been provided.
Cost of Revenue	Cost of Revenue Our cost of revenue includes the cost of products shipped to our customers, which primarily includes the cost of products built to our specifications by our contract manufacturers, the cost of silicon wafers supplied by independent semiconductor wafer manufacturers, and the related assembly, package, and test costs of our products. Also included in our cost of revenue are personnel and related costs, including share-based compensation, for quality assurance and manufacturing support personnel; logistics costs; depreciation of equipment supporting manufacturing; acquired intangibles amortization; fair value adjustments associated with acquired businesses; inventory write-downs and losses on purchase obligations; and warranty costs.
Inventories	Inventories Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value as of the end of fiscal 2018 and 2017 and consisted of the following (in millions): 2018 2017 Raw materials and work-in-progress $ 105.0 $ 94.7 Finished goods 26.2 36.7 $ 131.2 $ 131.4 We record a write-down, if necessary, to reduce the carrying value of inventory to its net realizable value. The effect of these write-downs is to establish a new cost basis in the related inventory, which we do not subsequently write up. We also record a liability and charge to cost of revenue for estimated losses on inventory we are obligated to purchase from our contract manufacturers when such losses become probable from customer delays, order cancellations, or other factors.
Property and Equipment	Property and Equipment We state property and equipment at cost less accumulated depreciation and amortization. We compute depreciation using the straight-line method over the estimated useful lives of the assets. We amortize leasehold improvements over the shorter of the lease term or the useful life of the asset.
Other Assets	Other Assets In April 2017, we paid $18.4 million for a 14.4% interest in OXi Technology Ltd., or OXi. Our investment in OXi is included in non-current other assets on our consolidated balance sheet. We determined the equity method of accounting applies to our investment as we have significant influence over OXi’s operating and financial policies. We record our portion of OXi’s net income/(loss) on a one quarter lag due to the timing of the availability of OXi’s financial records. In addition, we amortize intangible assets that we recorded under the equity method of accounting, and such amortization as well as our portion of Oxi’s net income/(loss) is included in equity investment loss on our consolidated statements of income. As of June 30, 2018, we did not have any related party transactions with OXi.
Foreign Currency	Foreign Currency The U.S. dollar is our functional and reporting currency. We remeasure our monetary assets and liabilities not denominated in the functional currency into U.S. dollar equivalents at the rate of exchange in effect on the balance sheet date. We measure and record non-monetary balance sheet accounts at the historical rate in effect at the date of transaction. We remeasure foreign currency expenses at the weighted average exchange rate in the month that the transaction occurred. These foreign currency transactions and remeasurement gains and losses, resulted in a net loss of $1.1 million, $0.7 million and $5.8 million in fiscal 2018, 2017, and 2016, respectively. Gains and losses resulting from foreign currency transactions are included in selling, general, and administrative expenses in the consolidated statements of income. We also enter into foreign currency contracts to manage exposure related to certain foreign currency obligations. The foreign currency contracts are not designated as hedging instruments and, accordingly, are not subject to hedge accounting. As of June 30, 2018 and 2017, we had no outstanding foreign currency forwards. In fiscal 2016 we recognized net realized gains of $4.8 million on foreign currency forward contracts, which are recorded in selling, general, and administrative expenses in the consolidated statements of income.
Goodwill	Goodwill Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired. Changes in our goodwill balance for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 206.8 $ 206.8 Acquisition activity 157.3 - Post acquisition adjustments 8.7 - Ending balance $ 372.8 $ 206.8 We have allocated our goodwill to two reporting units. We perform a qualitative assessment of the goodwill in the fourth quarter of each fiscal year. In assessing the qualitative factors, we considered the impact of key factors including change in industry and competitive environment, market capitalization, stock price, gross margin and cash flow from operating activities. We concluded that the fair value of the reporting units exceeded their carrying amount, therefore, there is no need for impairment. No goodwill impairment was recognized for fiscal 2018, 2017, and 2016.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets We evaluate long-lived assets, such as property and equipment and intangible assets subject to amortization, for impairment whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. We measure recoverability of assets to be held and used by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. We review the carrying value of indefinite-lived intangible assets for impairment at least annually during the last quarter of our fiscal year, or more frequently if we believe indicators of impairment exist. If the carrying amount of the asset exceeds its estimated undiscounted future cash flows, we recognize an impairment charge in an amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the consolidated balance sheets and reported at the lower of the carrying amount or fair value less costs to sell and would no longer be depreciated. The assets and liabilities of a disposed group classified as held for sale would be presented separately in the appropriate asset and liability sections of the consolidated balance sheets. During fiscal 2016, we recorded a $6.7 million impairment charge for an acquired intangible asset related to ThinTouch developed technology, which we determined is probable not to be recoverable, based on revenue forecasts. This intangible asset has been written down to zero. During fiscal 2018 and 2017, we did not have an impairment charge.
Other Accrued Liabilities	Other Accrued Liabilities As of the end of fiscal 2018 and 2017, other accrued liabilities consisted of the following (in millions): 2018 2017 Customer obligations $ 26.4 $ 34.8 Inventory obligations 28.8 41.8 Warranty 5.5 4.4 Other 19.0 20.8 $ 79.7 $ 101.8
Segment Information	Segment Information We operate in one segment: the development, marketing, and sale of intuitive human interface solutions for electronic devices and products. The chief operating decision maker is the chief executive officer who evaluates financial performance and allocates resources using financial information reported on a company-wide basis.
Share-Based Compensation	Share-Based Compensation We utilize the Black-Scholes option pricing model to estimate the grant date fair value of stock options granted to employees, which requires the input of highly subjective assumptions, including expected volatility and expected life. Historical and implied volatilities were used in estimating the fair value of our stock option awards. The expected life for our options was previously estimated based on historical trends since our initial public offering. In fiscal 2011, we began to grant options with a contractual life of seven years rather than 10 years, and we began using the simplified method to establish the expected life as we did not have any history of options with seven-year lives; after the first quarter of fiscal 2018 we ceased the granting of stock options. Our outstanding options have vesting periods of three or four years, depending on when they were granted, and we have continued to use the simplified method to establish the expected life. Changes in these inputs and assumptions can materially affect the measure of estimated fair value of our share-based compensation. Further, in fiscal years prior to 2018, we estimated forfeitures for share-based awards that were not expected to vest (see Note 9 for further discussion on estimated forfeitures). We charge estimated fair value less estimated forfeitures to earnings on a straight-line basis over the vesting period of the entire underlying award, which is generally three to four years for our stock option and deferred stock unit, or DSU, awards, three years for our market stock unit, or MSU, awards, three years for our performance stock units, or PSU, awards, and up to two years for our employee stock purchase plan. We estimate the fair value of market-based MSUs at the date of grant using a Monte Carlo simulation model and amortize those fair values over the requisite service period, generally three years. The Monte Carlo simulation model that we use to estimate the fair value of market-based MSUs at the date of grant incorporates into the valuation the possibility that the market condition may not be satisfied. Provided that the requisite service is rendered, the total fair value of the market-based MSUs at the date of grant must be recognized as compensation expense even if the market condition is not achieved. However, the number of shares that ultimately vest can vary significantly with the performance of the specified market criteria. We value the PSUs using the aggregate intrinsic value on the date of grant and amortize the compensation expense over the three-year service period on a ratable basis, dependent upon the probability of meeting the performance measures.
Income Taxes	Income Taxes We account for income taxes under the asset and liability method. We recognize deferred tax assets and liabilities for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and operating loss and tax credit carryforwards. We measure deferred tax assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. We recognize the effect of a change in tax rates in income on deferred tax assets and liabilities in the period that includes the enactment date. We establish valuation allowances when necessary to reduce deferred tax assets to the amounts that are more likely than not to be realized. We consider the operating earnings of our foreign subsidiaries to be indefinitely invested outside the United States. Accordingly, no provision has been made for the state or foreign taxes that may result from future remittances of undistributed earnings of our foreign subsidiaries. We use a two-step approach to recognizing and measuring uncertain tax positions. The first step is to determine whether it is more-likely-than-not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon ultimate settlement with a taxing authority. The calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of highly complex tax laws. Resolution of these uncertainties in a manner inconsistent with our expectations could have a material impact on our consolidated financial position, results of operations, and cash flows. We believe we have adequately provided for reasonably foreseeable outcomes in connection with the resolution of income tax uncertainties. However, our results have in the past, and could in the future, include favorable and unfavorable adjustments to our estimated tax liabilities in the period a determination of such estimated tax liability is made or resolved, upon the filing of an amended return, upon a change in facts, circumstances, or interpretation, or upon the expiration of a statute of limitation. Accordingly, our effective tax rate could fluctuate materially from period to period.
Research and Development	Research and Development Research and development costs are expensed as incurred.

Organization and Summary of S23

Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Investments in Available-for-Sale Securities and Cash Equivalents	Our cash equivalents and investments classified as available-for-sale securities as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 275.2 $ — $ 275.2 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 275.2 $ 1.5 $ 276.7 2017 Gross Amortized Unrealized Fair Cost Gains Value Reported as cash equivalents: Money market funds $ 361.7 $ — $ 361.7 Reported as non-current assets: Auction rate securities - 1.5 1.5 Total available-for-sale securities $ 361.7 $ 1.5 $ 363.2
Financial Assets Measured at Fair Value on a Recurring Basis	Financial assets measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the end of fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Money market $ 275.2 $ — $ — $ 361.7 $ — $ — Auction rate securities — — 1.5 — — 1.5 Total available-for-sale securities $ 275.2 $ — $ 1.5 $ 361.7 $ — $ 1.5
Changes in Fair Value of Level 3 Financial Assets	Changes in fair value of our Level 3 financial assets for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 1.5 $ 8.6 Net unrealized loss - (1.5 ) Impairment recovery on redeemed investments - 1.9 Redemptions - (7.5 ) Ending balance $ 1.5 $ 1.5
Accounts Receivable Balance Percentage of Different Customers	The following customers accounted for more than 10% of our accounts receivable balance as of the end of fiscal 2018 and 2017: 2018 2017 Customer A 13% 13% Customer B 11% 17% Customer C 10% 15% * Less than 10%
Inventories	Inventories are stated at the lower of cost (first-in, first-out method) or net realizable value as of the end of fiscal 2018 and 2017 and consisted of the following (in millions): 2018 2017 Raw materials and work-in-progress $ 105.0 $ 94.7 Finished goods 26.2 36.7 $ 131.2 $ 131.4
Schedule of Changes in Goodwill	Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired. Changes in our goodwill balance for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Beginning balance $ 206.8 $ 206.8 Acquisition activity 157.3 - Post acquisition adjustments 8.7 - Ending balance $ 372.8 $ 206.8
Other Accrued Liabilities	As of the end of fiscal 2018 and 2017, other accrued liabilities consisted of the following (in millions): 2018 2017 Customer obligations $ 26.4 $ 34.8 Inventory obligations 28.8 41.8 Warranty 5.5 4.4 Other 19.0 20.8 $ 79.7 $ 101.8

Net Income Per Share (Tables)

Net Income Per Share (Tables)	12 Months Ended
	Jun. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income Per Share	The computation of basic and diluted net income per share for fiscal 2018, 2017, and 2016 was as follows (in millions, except per share amounts): 2018 2017 2016 Numerator: Net income $ (124.1 ) $ 48.8 $ 72.2 Denominator: Shares, basic 34.2 34.8 36.6 Effect of dilutive share-based awards - 0.8 1.3 Shares, diluted 34.2 35.6 37.9 Net income per share: Basic $ (3.63 ) $ 1.40 $ 1.97 Diluted $ (3.63 ) $ 1.37 $ 1.91
Share-Based Awards, not Included in Calculation of Diluted Net Income Per Share	Diluted net income per share does not include the effect of potential common shares related to certain share-based awards for fiscal 2018, 2017, and 2016 as follows (in millions): 2018 2017 2016 Share-based awards 2.3 1.4 0.7

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment as of the end of fiscal 2018 and 2017 consisted of the following (in millions): Life 2018 2017 Land — $ 13.3 $ 13.3 Building and building improvements Up to 35 years 51.8 47.9 Computer equipment 3 - 5 years 42.9 29.7 Manufacturing equipment 1 78.1 75.7 Furniture, fixtures, and leasehold improvements 3 - 10 years 24.1 21.5 Capitalized software 3 - 7 years 35.0 32.5 245.2 220.6 Accumulated depreciation and amortization (127.4 ) (106.8 ) Property and equipment, net $ 117.8 $ 113.8

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Jun. 30, 2018
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the Conexant Closing Date (in millions): Cash $ 4.3 Accounts receivable 11.7 Inventory 51.0 Other current assets 3.5 Property and equipment 3.2 Acquired intangible assets 145.7 Other assets 0.9 Total identifiable assets acquired 220.3 Accounts payable 14.2 Accrued compensation 1.3 Other accrued liabilities 9.3 Other long-term liabilities 3.0 Net identifiable assets acquired 192.5 Goodwill 153.7 Net assets acquired $ 346.2
Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations	The following unaudited pro forma financial information (in millions, except per share data) presents the combined results of operations for us and Conexant as if the Conexant Acquisition had occurred on June 30, 2016. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the Conexant Acquisition actually taken place on June 30, 2016 and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the Conexant Acquisition. 2018 2017 Revenue $ 1,638.4 $ 1,829.0 Net income/(loss) (124.4 ) 34.9 Net income/(loss) per share (3.64 ) 1.01
Summary of Pro Forma Adjustments Used to Arrive Pro Forma Net Income	Pro forma adjustments used to arrive at pro forma net income for fiscal year 2018 and 2017 were as follows (in millions): 2018 2017 Buyer transaction costs $ 0.9 $ - Interest expense - (18.1 ) Intangible amortization (1.8 ) (23.7 ) Depreciation (0.5 ) (0.9 ) Income tax adjustment 0.4 15.0 Total $ (1.0 ) $ (27.7 )
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the amounts recorded for the estimated fair values of the assets acquired and liabilities assumed as of the Marvell Business Acquisition date (in millions): Inventory $ 28.4 Property and equipment 5.0 Acquired intangible assets 48.7 Total identifiable assets acquired 82.1 Accrued liabilities 0.7 Net identifiable assets acquired 81.4 Goodwill 12.3 Net assets acquired $ 93.7
Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations	The following unaudited pro forma financial information (in millions, except per share data) presents the combined results of operations for us and Marvell as if the Marvell Business Acquisition had occurred on June 30, 2016. The unaudited pro forma financial information has been prepared for comparative purposes only and does not purport to be indicative of the actual operating results that would have been recorded had the Marvell Business Acquisition actually taken place on June 30, 2016 and should not be taken as indicative of future consolidated operating results. Additionally, the unaudited pro forma financial results do not include any anticipated synergies or other expected benefits from the Marvell Business Acquisition. As the Marvell Business Acquisition was an asset acquisition and only a portion of Marvell’s multimedia solutions business was acquired, the unaudited pro forma financial information has been prepared using certain estimates. 2018 2017 Revenue $ 1,670.7 $ 1,793.6 Net income/(loss) (123.6 ) 27.7 Net income/(loss) per share (3.61 ) 0.82
Summary of Pro Forma Adjustments Used to Arrive Pro Forma Net Income	Pro forma adjustments used to arrive at pro forma net loss for fiscal 2018 and 2017 were as follows (in millions): 2018 2017 Buyer transaction costs $ 1.1 $ - Interest expense - (19.6 ) Intangible amortization (2.3 ) (17.6 ) Income tax adjustment 0.3 13.0 Total $ (0.9 ) $ (24.2 )

Acquired Intangibles (Tables)

Acquired Intangibles (Tables)	12 Months Ended
	Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Life, Gross Carrying Value of Acquired Intangible Assets, and Related Accumulated Amortization	The following table summarizes the life, the gross carrying value of our acquired intangible assets, and the related accumulated amortization as of the end of fiscal 2018 and 2017 (in millions): Weighted Average 2018 2017 Life in Years Gross Carrying Value Accumulated Amortization Net Carrying Value Gross Carrying Value Accumulated Amortization Net Carrying Value Display driver technology 5.3 $ 164.0 $ (116.5 ) $ 47.5 $ 164.0 $ (84.9 ) $ 79.1 Audio and video technology 5.5 133.9 (22.8 ) 111.1 - - - Fingerprint authentication technology 4.0 55.7 (53.7 ) 2.0 63.5 (47.6 ) 15.9 Customer relationships 4.1 81.8 (38.5 ) 43.3 48.4 (46.0 ) 2.4 Licensed technology and other 4.3 9.0 (3.0 ) 6.0 1.3 (1.3 ) - Tradename 7.0 1.9 (0.2 ) 1.7 - - - Patents 7.7 4.6 (1.7 ) 2.9 4.8 (1.2 ) 3.6 Backlog 0.5 0.5 (0.5 ) - - - - In-process research and development Not applicable 4.7 - 4.7 - - - Acquired intangibles, gross 5.0 $ 456.1 $ (236.9 ) $ 219.2 $ 282.0 $ (181.0 ) $ 101.0
Schedule of Expected Annual Aggregate Amortization Expense	The following table presents expected annual aggregate amortization expense in future fiscal years (in millions): 2019 $ 74.0 2020 50.5 2021 36.5 2022 32.0 2023 19.5 Thereafter 2.0 To be determined 4.7 Future amortization $ 219.2

Debt (Tables)

Debt (Tables)	12 Months Ended
	Jun. 30, 2018
Debt Disclosure [Abstract]
Schedule of Contractual Interest Expense and Amortization of Discount on Notes	The contractual interest expense and amortization of discount on the Notes for fiscal 2018, were as follows (in millions): Fiscal 2018 Interest expense $ 2.7 Amortization of discount and debt issuance costs 16.9 Total interest $ 19.6

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Jun. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Aggregate Minimum Rental Commitments for Non-cancelable Operating Leases	The aggregate minimum rental commitments in future fiscal years for non-cancelable operating leases with initial or remaining terms in excess of one year were as follows (in millions): Operating Lease Fiscal Year Payments 2019 $ 6.0 2020 3.6 2021 1.6 2022 0.4 2023 0.3 Thereafter 0.1 Total minimum operating lease payments $ 12.0

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Jun. 30, 2018
Equity [Abstract]
Shares Reserved for Future Issuance	Shares of common stock reserved for future issuance as of the end of fiscal 2018 were as follows: Stock options outstanding 1,618,209 Deferred stock units outstanding 1,853,558 Market stock units outstanding 354,726 Performance stock units outstanding 294,541 Awards available for grant under all share-based compensation plans 2,210,217 Reserved for future issuance 6,331,251

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-Based Compensation Awards Available for Grant or Issuance	Share-based compensation awards available for grant or issuance for each plan as of the beginning of the fiscal year, including changes in the balance of awards available for grant for fiscal 2018, were as follows: Awards 2010 Available 2001 2010 Employee Under All Incentive Incentive Stock Share-Based Compensation Compensation Purchase Award Plans Plan Plan Plan Balance at June 2017 2,947,069 — 2,566,899 380,170 Additional shares authorized 2,346,384 — 2,000,000 346,384 Stock options granted (61,825 ) — (61,825 ) — Deferred stock units granted (1,331,073 ) — (1,331,073 ) — Market stock units granted (300,071 ) — (300,071 ) — Performance stock units granted (315,380 ) — (315,380 ) — Market stock units performance adjustment 68,003 — 68,003 — Purchases under employee stock purchase plan (486,263 ) — — (486,263 ) Forfeited 692,035 4,500 687,535 — Plan shares expired (4,500 ) (4,500 ) — — Fungible Shares Ratio Adjustment (1,344,162 ) — (1,344,162 ) — Balance at June 2018 2,210,217 — 1,969,926 240,291
Share-Based Compensation and Related Tax Benefit Recognized in Consolidated Statements of Income	Share-based compensation and the related tax benefit recognized in our consolidated statements of income for fiscal 2018, 2017, and 2016 were as follows (in millions): 2018 2017 2016 Cost of revenue $ 3.2 $ 2.2 $ 1.8 Research and development 38.6 33.1 30.6 Selling, general, and administrative 29.5 26.5 24.4 Total $ 71.3 $ 61.8 $ 56.8 Income tax benefit on share-based compensation $ 11.1 $ 16.1 $ 14.7
Balance of Outstanding and Exercisable Stock Options	Certain stock option activity for fiscal 2018 and balances as of the end of fiscal 2018 were as follows: Stock Weighted Option Average Intrinsic Awards Exercise Value Outstanding Price (In millions) Balance at June 2017 2,490,168 $ 49.20 Granted 61,825 45.32 Exercised (690,310 ) 24.08 Forfeited (105,124 ) 59.36 Expired (138,350 ) 72.08 Balance at June 2018 1,618,209 57.14 $ 9.2 Exercisable at June 2018 1,378,833 57.09 $ 8.9
Cash Received and Aggregate Intrinsic Value of Stock Options Exercised	Cash received and the aggregate intrinsic value of stock options exercised for fiscal 2018, 2017, and 2016 were as follows (in millions): 2018 2017 2016 Cash received $ 16.7 $ 10.7 $ 16.6 Aggregate intrinsic value $ 15.2 $ 12.3 $ 29.7
Shares Purchased, Weighted Average Purchase Price, Cash Received, and Aggregate Intrinsic Value for ESPP	Shares purchased, weighted average purchase price, cash received, and the aggregate intrinsic value for employee stock purchase plan purchases in fiscal 2018, 2017, and 2016 were as follows (in millions, except shares purchased and weighted average purchase price): 2018 2017 2016 Shares purchased 486,263 302,085 302,781 Weighted average purchase price $ 32.07 $ 46.74 $ 52.42 Cash received $ 15.6 $ 14.1 $ 15.8 Aggregate intrinsic value $ 3.9 $ 2.7 $ 7.0
Fair Value of Each Award Granted under ESPP	The fair value of each award granted under our 2010 ESPP for fiscal 2018, 2017, and 2016 was estimated using the Black-Scholes option pricing model, assuming no expected dividends and the following range of assumptions: 2018 2017 2016 Expected volatility 43.7 - 49.8% 38.4 - 54.9% 37.4% - 40.6% Expected life in years 0.5 - 2.0 0.5 - 2.0 0.5 - 1.0 Risk-free interest rate 1.42% - 2.45% 0.62% - 1.20% 0.33% - 0.54% Fair value per award $ 13.54 $ 20.44 $ 24.52
Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance and Aggregate Intrinsic Value of Stock Units	MSU activity, including MSUs granted, delivered, and forfeited in fiscal 2018, and the balance and aggregate intrinsic value of MSUs as of the end of fiscal 2018 were as follows: Aggregate Weighted Intrinsic Average MSU Awards Value Grant Date Outstanding (in millions) Fair Value Balance at June 30, 2017 158,596 $ 82.88 Granted 300,071 53.02 Performance adjustment (68,003 ) — Delivered — — Forfeited (35,938 ) 76.93 Balance at June 30, 2018 354,726 $ 17.9 59.37
Deferred stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance and Aggregate Intrinsic Value of Stock Units	DSU activity, including DSUs granted, delivered, and forfeited in fiscal 2018, and the balance and aggregate intrinsic value of DSUs as of the end of fiscal 2018 were as follows: Aggregate Weighted Intrinsic Average DSU Awards Value Grant Date Outstanding (in millions) Fair Value Balance at June 30, 2017 1,320,798 $ 69.14 Granted 1,331,073 40.52 Delivered (545,028 ) 70.26 Forfeited (253,285 ) 58.42 Balance at June 30, 2018 1,853,558 $ 93.4 49.75
Stock Option Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value of Each Award Granted	The fair value of each award granted under our share-based compensation plans for fiscal 2018, 2017, and 2016 was estimated at the date of grant using the Black-Scholes option pricing model, assuming no expected dividends and the following range of assumptions: 2018 2017 2016 Expected volatility 46.2% 45.2% - 48.3% 40.4% - Expected life in years 4.4 3.8 3.8 Risk-free interest rate 1.8% 1.03% - 1.94% 1.22% - 1.72% Fair value per award $ 18.04 $ 21.08 $ 28.30
Incentive Compensation Plans [member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair Value of Each Award Granted	The fair value of each MSU granted from our plans for fiscal 2018, 2017, and 2016 was estimated at the date of grant using the Monte Carlo simulation model, assuming no expected dividends and the following assumptions: 2018 2017 2016 Expected volatility of company 49.16% - 50.60% 52.54 % 45.57 % Expected volatility of SOX index 22.37% - 22.52% 21.23 % 19.65 % Correlation coefficient 0.52 - 0.53 0.45 0.42 Expected life in years 2.80 - 2.92 2.92 2.94 Risk-free interest rate 1.72% - 1.88% 1.01 % 0.92 % Fair value per award $48.22 - $59.19 $ 67.51 $ 126.74

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Tabular Disclosure of Income (Loss) Before Income Tax Between Domestic and Foreign Jurisdictions	Income/(loss) before provision for income taxes for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 United States $ (51.1 ) $ (10.1 ) $ 12.3 Foreign (30.7 ) 71.4 63.3 Income/(loss) before provision for income taxes $ (81.8 ) $ 61.3 $ 75.6
Provision for Income Taxes	The provision for income taxes for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Current tax expense Federal $ 21.5 $ 9.6 $ 12.1 Foreign 14.1 25.5 12.4 35.6 35.1 24.5 Deferred tax expense/(benefit) Federal 14.4 (10.6 ) (7.5 ) Foreign (9.5 ) (12.3 ) (13.6 ) 4.9 (22.9 ) (21.1 ) Provision for income taxes $ 40.5 $ 12.2 $ 3.4
Provision for Income Taxes Differs from Federal Statutory Rate	The provision for income taxes differs from the federal statutory rate for fiscal 2018, 2017, and 2016 as follows (in millions): 2018 2017 2016 Provision at U.S. federal statutory rate $ (22.9 ) $ 21.5 $ 26.6 Qualified stock options 4.9 5.5 5.1 Shortfall related to share-based compensation 4.1 — — Business credits (4.9 ) (3.6 ) (10.3 ) Foreign tax differential 16.5 (13.2 ) (22.4 ) Non-deductible portion of contingent consideration — 0.9 0.9 Change in valuation allowance — (0.8 ) (1.4 ) Nondeductible amortization 1.2 1.6 4.4 Taxes associated with one-time transition tax 44.1 — — Impact of corporate tax rate change on deferred taxes (2.7 ) — — Other differences 0.2 0.3 0.5 Provision for income taxes $ 40.5 $ 12.2 $ 3.4
Significant Components of Deferred Tax Assets (Liabilities)	Significant components of our deferred tax assets (liabilities) as of the end of fiscal 2018 and 2017 consisted of the following (in millions): 2018 2017 Deferred tax assets: Investment writedowns $ 1.1 $ 1.8 Inventory writedowns 11.6 7.4 Property and equipment 1.9 3.0 Accrued compensation 0.1 0.2 Deferred compensation 0.6 1.9 Share-based compensation 11.1 15.6 Business credit carryforward 25.3 19.2 Net operating loss carryforward — 0.3 Acquisition intangibles 0.6 — Other accruals 1.6 2.0 53.9 51.4 Valuation allowance (23.3 ) (15.8 ) 30.6 35.6 Deferred tax liabilities: Acquisition intangibles — (9.2 ) Interest (14.7 ) (3.3 ) (14.7 ) (12.5 ) Net deferred tax assets $ 15.9 $ 23.1
Reconciliation of Gross Unrecognized Tax Benefits	A reconciliation of the beginning and ending balance of gross unrecognized tax benefits for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Beginning balance $ 15.2 $ 13.4 $ 11.6 Increase in unrecognized tax benefits related to current year tax positions 10.5 2.5 1.6 Increase in unrecognized tax benefits related to prior year tax positions — 0.1 1.1 Decrease due to statute expiration (0.9 ) (0.8 ) (0.9 ) Ending Balance $ 24.8 $ 15.2 $ 13.4

Segment, Customers, and Geogr33

Segment, Customers, and Geographic Information (Tables)	12 Months Ended
	Jun. 30, 2018
Net Revenue within Geographic Areas Based on Customers' Locations	Net revenue within geographic areas based on our customers’ locations for fiscal 2018, 2017, and 2016, consisted of the following (in millions): 2018 2017 2016 China $ 803.2 $ 844.8 $ 518.7 Japan 358.6 426.5 651.0 Taiwan 235.2 66.4 61.1 United States 90.9 231.4 249.1 Other 74.9 25.3 4.5 South Korea 67.5 123.8 182.5 $ 1,630.3 $ 1,718.2 $ 1,666.9
Net Revenue from External Customers	Net revenue from external customers for each group of similar products for fiscal 2018, 2017, and 2016 consisted of the following (in millions): 2018 2017 2016 Mobile product applications $ 1,021.0 $ 1,406.0 $ 1,398.2 PC product applications 257.8 229.2 207.4 IoT product applications 351.5 83.0 61.3 $ 1,630.3 $ 1,718.2 $ 1,666.9
Long-Lived Assets within Geographic Areas	Long-lived assets within geographic areas as of the end of fiscal 2018 and 2017 consisted of the following (in millions): 2018 2017 United States $ 193.3 $ 159.4 Asia/Pacific 273.8 262.2 Europe 242.7 - $ 709.8 $ 421.6
Sales Revenue, Net [Member]
Major Customers' Revenue as a Percentage of Total Net Revenue	Major customers’ revenue as a percentage of total net revenue for fiscal 2018, 2017, and 2016 were as follows: 2018 2017 2016 Customer A 15% 24% 20% Customer B 12% * * Customer C * 19% 21% Customer D * 10% * Customer E * * 15% _____________ * Less than 10%

Restructuring Activities (Table

Restructuring Activities (Tables)	12 Months Ended
	Jun. 30, 2018
Restructuring And Related Activities [Abstract]
Restructuring Liability Activities	The restructuring liability activities during fiscal year 2018 were as follows (in millions): Employee Severance Facility Consolidation and Benefits and Related Charges Total Accruals $ 11.0 $ 1.0 $ 12.0 Cash payments (8.8 ) (0.2 ) (9.0 ) Non-cash settlements - (0.7 ) (0.7 ) Balance as of June 30, 2018 $ 2.2 $ 0.1 $ 2.3 The restructuring liability activities during fiscal 2018, 2017, and 2016 were as follows (millions): Employee Severance Facility Consolidation and Benefits and Related Charges Total Balance as of June 30, 2015 $ - $ - $ - Accruals 6.7 6.7 Balance as of June 30, 2016 6.7 - 6.7 Additional accruals 5.0 2.3 7.3 Cash payments (11.7 ) (0.9 ) (12.6 ) Non-cash settlements - (0.8 ) (0.8 ) Balance as of June 30, 2017 - 0.6 0.6 Adjustments - (0.2 ) (0.2 ) Cash payments - (0.4 ) (0.4 ) Balance as of June 30, 2018 $ - $ - $ -

Organization and Summary of S35

Organization and Summary of Significant Accounting Policies - Investments in Available-for-Sale Securities and Cash Equivalents (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 275.2	$ 361.7
Gross Unrealized Gains	1.5	1.5
Fair Value	276.7	363.2
Money Market [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	275.2	361.7
Fair Value	275.2	361.7
Non-Current Assets [Member] | Auction Rate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	1.5	1.5
Fair Value	$ 1.5	$ 1.5

Organization and Summary of S36

Organization and Summary of Significant Accounting Policies - Financial Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$ 276.7	$ 363.2
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	275.2	361.7
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	1.5	1.5
Fair Value, Measurements, Recurring [Member] | Money Market [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	275.2	361.7
Fair Value, Measurements, Recurring [Member] | Auction Rate Securities [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$ 1.5	$ 1.5

Organization and Summary of S37

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Apr. 30, 2017USD ($)	Jun. 30, 2018USD ($)TimeSegment	Jun. 24, 2017USD ($)	Jun. 25, 2016USD ($)	Jun. 25, 2011	Jun. 30, 2017USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Contractual liability		$ 8,700,000
Transfer amount of assets of level one		0	$ 0
Transfer amount of assets of level two		0	0
Transfer amount of assets of level three		0	0
Transfer amount of assets out of level three		0	0
Equity method investment			18,400,000
Net gain (loss) on foreign currency transactions		(1,100,000)	(700,000)	$ (5,800,000)
Foreign currency forward contracts outstanding amount		$ 0				$ 0
Number of reporting units | Segment		2
Goodwill impairment		$ 0	0	0
Impairment of acquired intangibles				6,700,000
Number of operating segments | Segment		1
Contractual life of grant option					7 years
Contractual life of Grant option					10 years
Performance stock units outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		3 years
Requisite service period		3 years
Market stock units outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		3 years
Requisite service period		3 years
Thin Touch Developed Technology [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Impairment of acquired intangibles		$ 0	$ 0	6,700,000
Intangible assets				0
Forward Contracts [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Net gain (loss) on foreign currency transactions				$ 4,800,000
OXi Technology Ltd [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Equity method investment	$ 18,400,000
Equity method investment, ownership percentage	14.40%
Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Stock rotation rights of inventory per year for distributors | Time		2
Maximum [Member] | Deferred stock units outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		4 years
Maximum [Member] | Stock option outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		4 years
Maximum [Member] | Employee stock purchase plan [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		2 years
Minimum [Member] | Deferred stock units outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		3 years
Minimum [Member] | Stock option outstanding [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Earlier Options vesting period		3 years

Organization and Summary of S38

Organization and Summary of Significant Accounting Policies - Changes in Fair Value of Level 3 Financial Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Fair Value Disclosures [Abstract]
Beginning balance	$ 1.5	$ 8.6
Net unrealized loss	0	(1.5)
Impairment recovery on redeemed investments	0	1.9
Redemptions	0	(7.5)
Ending balance	$ 1.5	$ 1.5

Organization and Summary of S39

Organization and Summary of Significant Accounting Policies - Accounts Receivable Balance Percentage of Different Customers (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	13.00%	13.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	11.00%	17.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	15.00%

Organization and Summary of S40

Organization and Summary of Significant Accounting Policies - Accounts Receivable Balance Percentage of Different Customers (Parenthetical) (Detail)	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Accounts Receivable [Member] | Credit Concentration Risk [Member] | Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%

Organization and Summary of S41

Organization and Summary of Significant Accounting Policies - Inventories (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Inventory Disclosure [Abstract]
Raw materials and work-in-progress	$ 105	$ 94.7
Finished goods	26.2	36.7
Total Inventories	$ 131.2	$ 131.4

Organization and Summary of S42

Organization and Summary of Significant Accounting Policies - Schedule of Changes in Goodwill (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning balance	$ 206.8
Acquisition activity	157.3
Post acquisition adjustments	8.7
Ending balance	$ 372.8

Organization and Summary of S43

Organization and Summary of Significant Accounting Policies - Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Payables And Accruals [Abstract]
Customer obligations	$ 26.4	$ 34.8
Inventory obligations	28.8	41.8
Warranty	5.5	4.4
Other	19	20.8
Other accrued liabilities	$ 79.7	$ 101.8

Net Income Per Share - Computat

Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Numerator:
Net income	$ (124.1)	$ 48.8	$ 72.2
Denominator:
Shares, basic	34.2	34.8	36.6
Effect of dilutive share-based awards		0.8	1.3
Shares, diluted	34.2	35.6	37.9
Net income per share:
Basic	$ (3.63)	$ 1.40	$ 1.97
Diluted	$ (3.63)	$ 1.37	$ 1.91

Net Income Per Share - Share-Ba

Net Income Per Share - Share-Based Awards, not Included in Calculation of Diluted Net Income Per Share (Detail) - shares shares in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Share-Based Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share-based awards	2.3	1.4	0.7

Property and Equipment - Proper

Property and Equipment - Property and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 245.2	$ 220.6
Accumulated depreciation and amortization	(127.4)	(106.8)
Property and equipment, net	117.8	113.8
Land [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	13.3	13.3
Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 51.8	47.9
Building and Building Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	35 years
Computer Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 42.9	29.7
Computer Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	3 years
Computer Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	5 years
Manufacturing Equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 78.1	75.7
Manufacturing Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	1 year
Manufacturing Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	5 years
Furniture, Fixtures and Leasehold Improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 24.1	21.5
Furniture, Fixtures and Leasehold Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	3 years
Furniture, Fixtures and Leasehold Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	10 years
Capitalized Software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 35	$ 32.5
Capitalized Software [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	3 years
Capitalized Software [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives	7 years

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Property Plant And Equipment Useful Life And Values [Abstract]
Retirement of fully amortized property	$ 8.2	$ 10.8

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Millions	Sep. 08, 2017	Jul. 25, 2017	Jun. 11, 2017	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Business Acquisition [Line Items]
Issuance of common stock for acquisition, value						$ 39.1
Acquired intangible assets amortize over an estimated weighted average useful life						5 years
Net revenue						$ 1,630.3	$ 1,718.2	$ 1,666.9
Operating income/(loss)						$ (61.9)	$ 64.7	$ 75.2
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets amortize over an estimated weighted average useful life						4 years 1 month 6 days
Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible assets amortize over an estimated weighted average useful life						6 months
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Acquired intangible assets		$ 145.7
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member]
Business Acquisition [Line Items]
Acquisition agreement date			Jun. 11, 2017
Acquisition closing effective date		Jul. 25, 2017
Purchase price of acquisition		$ 305.4
Issuance of common stock for acquisition, shares		726,666
Issuance of common stock for acquisition, value		$ 39.1
Business acquisition stock appreciation rights liability		3.5
Purchase price held in escrow		16.8
Business combination purchase price adjustment		1.9
Business combination, consideration transferred		346.2
Acquired intangible assets				$ 145.7	$ 145.7	$ 145.7
Net revenue					116.5
Operating income/(loss)					(37)
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Maximum [Member]
Business Acquisition [Line Items]
Identified intangible assets included discount rates						14.00%
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Minimum [Member]
Business Acquisition [Line Items]
Identified intangible assets included discount rates						9.00%
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets				104.9	104.9	$ 104.9
Acquired intangible assets amortize over an estimated weighted average useful life						6 years
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets				38.4	38.4	$ 38.4
Acquired intangible assets amortize over an estimated weighted average useful life						5 years
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Trademarks [Member]
Business Acquisition [Line Items]
Acquired intangible assets				1.8	1.8	$ 1.8
Acquired intangible assets amortize over an estimated weighted average useful life						7 years
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible assets				0.4	0.4	$ 0.4
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Backlog [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets amortize over an estimated weighted average useful life						1 year
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | In-Process Research and Development [Member]
Business Acquisition [Line Items]
Acquired intangible assets				0.2	$ 0.2	$ 0.2
Conexant Systems, LLC [Member] | Securities Purchase Agreement [Member] | Escrow Obligations Under Purchase Agreement [Member]
Business Acquisition [Line Items]
Purchase price held in escrow		$ 7
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 48.7
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member]
Business Acquisition [Line Items]
Acquisition agreement date			Jun. 11, 2017
Acquisition closing effective date	Sep. 8, 2017
Purchase price of acquisition	$ 93.7
Acquired intangible assets	$ 48.7
Net revenue				138
Operating income/(loss)				$ (14.1)
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Maximum [Member]
Business Acquisition [Line Items]
Identified intangible assets included discount rates	32.00%
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Minimum [Member]
Business Acquisition [Line Items]
Identified intangible assets included discount rates	14.00%
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Developed Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 29
Acquired intangible assets amortize over an estimated weighted average useful life	3 years 7 months 6 days
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 15.1
Acquired intangible assets amortize over an estimated weighted average useful life	4 years
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 0.1
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | Backlog [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets amortize over an estimated weighted average useful life	1 year
Marvell Technology Group Ltd [Member] | Asset Purchase Agreement [Member] | In-Process Research and Development [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 4.5

Acquisitions - Summary of Estim

Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Sep. 08, 2017	Jul. 25, 2017	Jun. 24, 2017	Jun. 25, 2016
Business Acquisition [Line Items]
Goodwill	$ 372.8			$ 206.8	$ 206.8
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Cash			$ 4.3
Accounts receivable			11.7
Inventory			51
Other current assets			3.5
Property and equipment			3.2
Acquired intangible assets			145.7
Other assets			0.9
Total identifiable assets acquired			220.3
Accounts payable			14.2
Accrued compensation			1.3
Other accrued liabilities			9.3
Other long-term liabilities			3
Net identifiable assets acquired			192.5
Goodwill			153.7
Net assets acquired			$ 346.2
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Inventory		$ 28.4
Property and equipment		5
Acquired intangible assets		48.7
Total identifiable assets acquired		82.1
Accrued liabilities		0.7
Net identifiable assets acquired		81.4
Goodwill		12.3
Net assets acquired		$ 93.7

Acquisitions - Summary of Unaud

Acquisitions - Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Revenue	$ 1,638.4	$ 1,829
Net income/(loss)	$ (124.4)	$ 34.9
Net income/(loss) per share	$ (3.64)	$ 1.01
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Revenue	$ 1,670.7	$ 1,793.6
Net income/(loss)	$ (123.6)	$ 27.7
Net income/(loss) per share	$ (3.61)	$ 0.82

Acquisitions - Summary of Pro F

Acquisitions - Summary of Pro Forma Adjustments Used to Arrive Pro Forma Net Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Buyer transaction costs	$ 0.9
Interest expense		$ (18.1)
Intangible amortization	(1.8)	(23.7)
Depreciation	(0.5)	(0.9)
Income tax adjustment	0.4	15
Total	(1)	(27.7)
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Buyer transaction costs	1.1
Interest expense		(19.6)
Intangible amortization	(2.3)	(17.6)
Income tax adjustment	0.3	13
Total	$ (0.9)	$ (24.2)

Acquired Intangibles - Summary

Acquired Intangibles - Summary of Life, Gross Carrying Value of Acquired Intangible Assets, and Related Accumulated Amortization (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 456.1	$ 282
Acquired intangibles, Accumulated Amortization	(236.9)	(181)
Acquired intangibles, Net Carrying Value	$ 219.2	101
Weighted Average Life in Years	5 years
Display Driver Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 164	164
Acquired intangibles, Accumulated Amortization	(116.5)	(84.9)
Acquired intangibles, Net Carrying Value	$ 47.5	79.1
Weighted Average Life in Years	5 years 3 months 18 days
Audio and Video Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 133.9
Acquired intangibles, Accumulated Amortization	(22.8)
Acquired intangibles, Net Carrying Value	$ 111.1
Weighted Average Life in Years	5 years 6 months
Fingerprint Authentication Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 55.7	63.5
Acquired intangibles, Accumulated Amortization	(53.7)	(47.6)
Acquired intangibles, Net Carrying Value	$ 2	15.9
Weighted Average Life in Years	4 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 81.8	48.4
Acquired intangibles, Accumulated Amortization	(38.5)	(46)
Acquired intangibles, Net Carrying Value	$ 43.3	2.4
Weighted Average Life in Years	4 years 1 month 6 days
Licensed Technology and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 9	1.3
Acquired intangibles, Accumulated Amortization	(3)	(1.3)
Acquired intangibles, Net Carrying Value	$ 6
Weighted Average Life in Years	4 years 3 months 18 days
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 1.9
Acquired intangibles, Accumulated Amortization	(0.2)
Acquired intangibles, Net Carrying Value	$ 1.7
Weighted Average Life in Years	7 years
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 4.6	4.8
Acquired intangibles, Accumulated Amortization	(1.7)	(1.2)
Acquired intangibles, Net Carrying Value	$ 2.9	$ 3.6
Weighted Average Life in Years	7 years 8 months 12 days
Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 0.5
Acquired intangibles, Accumulated Amortization	$ (0.5)
Weighted Average Life in Years	6 months
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles, Gross Carrying Value	$ 4.7
Acquired intangibles, Net Carrying Value	$ 4.7

Acquired Intangibles - Addition

Acquired Intangibles - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Finite-Lived Intangible Assets [Line Items]
Acquired intangibles amortization	$ 83.9	$ 59.3	$ 73
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Disposal group including discontinued operation, intangible assets	20.1
Fingerprint Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Disposal group including discontinued operation, intangible assets	4.3	12.1
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Disposal group including discontinued operation, intangible assets	$ 0.1
Supplier Arrangements [Member]
Finite-Lived Intangible Assets [Line Items]
Disposal group including discontinued operation, intangible assets		$ 22

Acquired Intangibles - Schedule

Acquired Intangibles - Schedule of Expected Annual Aggregate Amortization Expense (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
2,019	$ 74
2,020	50.5
2,021	36.5
2,022	32
2,023	19.5
Thereafter	2
To be determined	4.7
Acquired intangibles, Net Carrying Value	$ 219.2	$ 101

Debt - Additional Information (

Debt - Additional Information (Detail)	Jun. 26, 2017USD ($)shares	Jun. 20, 2017USD ($)Day$ / sharesshares	Sep. 30, 2017USD ($)	Jun. 30, 2018USD ($)shares	Jun. 24, 2017USD ($)shares	Jun. 25, 2016USD ($)	Mar. 31, 2018USD ($)	Jul. 31, 2017USD ($)
Debt Instrument [Line Items]
Number of shares of common stock repurchase | shares				27,639,876	25,941,476
Remaining debt issuance costs expensed				$ 1,600,000	$ 1,200,000	$ 1,000,000
Debt issuance cost				$ 1,100,000	1,200,000	$ 300,000
Percentage of voting capital stock				65.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding principal amount					100,000,000
0.50% Convertible Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument aggregate principal amount							$ 525,000,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Outstanding principal amount					220,000,000
Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount					450,000,000			$ 250,000,000
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt amortization period				60 months
Outstanding principal amount				$ 0
Line of credit facility amount			$ 200,000,000
Line of credit facility allowable requests for additional borrowing			100,000,000
Maturity period				Sep. 27, 2022
Repayment date, description				The revolving credit facility is required to be repaid in full on the earlier of (i) September 27, 2022, and (ii) the date 91 days prior to the Maturity Date of the Notes if the Notes have not been refinanced in full by such date
Debt issuance cost				$ 2,300,000
Description of base rate				The revolving credit facility bears interest at our election of a Base Rate plus an Applicable Margin or LIBOR plus an Applicable Margin. Swingline loans bear interest at a Base Rate plus an Applicable Margin. The Base Rate is a floating rate that is the greater of the Prime Rate, the Federal Funds Rate plus 50 basis points, or LIBOR plus 100 basis points. The Applicable Margin is based on a sliding scale which ranges from 0.25 to 100 basis points for Base Rate loans and 100 basis points to 175 basis points for LIBOR loans.
Covenant description				Under the Agreement, there are various restrictive covenants, including financial covenants which limit the consolidated total leverage ratio, or leverage ratio, the consolidated interest coverage ratio, or interest coverage ratio, a restriction which places a limit on the amount of capital expenditures that may be made in any fiscal year, a restriction that permits up to $50 million per fiscal quarter of accounts receivable financings, and sets the Specified Leverage Ratio. The leverage ratio is the ratio of debt as of the measurement date to earnings before interest, taxes, depreciation and amortization, or EBITDA, for the four consecutive quarters ending with the quarter of measurement. The current leverage ratio shall not exceed 3.50 to 1.00 provided that for the four fiscal quarters ending after the date of a material acquisition, such maximum leverage ratio shall be adjusted to 3.75 to 1.00, and thereafter, shall not be more than 3.50 to 1.00. The interest coverage ratio is EBITDA to interest expense for the four consecutive quarters ending with the quarter of measurement. The interest coverage ratio must not be less than 3.50 to 1.0 during the term of the Agreement. The Specified Leverage Ratio is the ratio used in determining, among other things, whether we are permitted to make dividends and/or prepay certain indebtedness, at a fixed ratio of 3.00 to 1.00. As of the end of the fiscal year, we were in compliance with the restrictive covenants
Maximum accounts receivable financings per quarter				$ 50,000,000
Maximum leverage ratio permitted				3.50%
Minimum interest coverage ratio				3.50%
Fixed coverage ratio				3.00%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | For The First Four Fiscal Quarters Ending After Date of Material Acquisition [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted				3.75%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Thereafter [Member]
Debt Instrument [Line Items]
Maximum leverage ratio permitted				3.50%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Federal Funds Rates [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion				0.175%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				0.0025%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage of unused portion				0.25%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.75%
Amendment and Restatement Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Amendment and Restatement Agreement [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility amount			20,000,000
Amendment and Restatement Agreement [Member] | Bridge Loan [Member]
Debt Instrument [Line Items]
Line of credit facility amount			20,000,000
Purchase Agreement [Member] | 0.50% Convertible Senior Notes due 2022 [Member] | Wells Fargo Securities, LLC [Member]
Debt Instrument [Line Items]
Debt instrument aggregate principal amount		$ 500,000,000
Debt instrument additional aggregate principal amount		$ 25,000,000
Option to purchase additional principal amount of notes granted to initial purchasers, period		30 days
Net proceeds from issuance of convertible debt	$ 514,500,000
Number of shares of common stock repurchase | shares	1,698,400
Interest rates on borrowings		0.50%
Debt instrument maturity date				Jun. 15, 2022
Conversion of notes in multiples of principal amounts		$ 1,000
Convertible number of shares, principal amount of notes | shares		13.6947
Initial conversion price per share of common stock | $ / shares		$ 73.02
Note repurchase price, percentage of principal amount of notes		100.00%
Sale price of common stock, minimum threshold percentage		130.00%
Sale of common stock, threshold trading days | Day		20
Sale of common stock, threshold consecutive trading days | Day		30
Equity component of the principal amount of the convertible debt		$ 82,100,000
Nonconvertible debt borrowing rate		4.39%
Debt instrument term		5 years
Debt issuance costs		$ 11,100,000
Initial purchaser’s discount		10,500,000
Legal, accounting, and printing costs		579,000
Convertible debt issuance costs pro rata to equity components		1,900,000
Convertible debt issuance costs pro rata to debt components		$ 9,200,000
Debt amortization period		5 years
Unamortized amounts of debt issuance costs				$ 7,400,000
Unamortized amounts of debt discount				$ 66,800,000
Term Loan Arrangement [Member]
Debt Instrument [Line Items]
Outstanding principal amount					$ 120,000,000
Term Loan Arrangement [Member] | Amendment and Restatement Agreement [Member]
Debt Instrument [Line Items]
Remaining debt issuance costs expensed			$ 1,000,000

Debt - Schedule of Contractual

Debt - Schedule of Contractual Interest Expense and Amortization of Discount on Notes (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)
Debt Instrument [Line Items]
Amortization of discount and debt issuance costs	$ 16.9
Purchase Agreement [Member] | 0.50% Convertible Senior Notes due 2022 [Member] | Wells Fargo Securities, LLC [Member]
Debt Instrument [Line Items]
Interest expense	2.7
Amortization of discount and debt issuance costs	16.9
Total interest	$ 19.6

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Commitments Contingencies And Litigation [Line Items]
Period of expiration dates of operating leases for office facilities	2019 to 2024
Total rent expense, recognized on a straight-line basis	$ 12	$ 10.6	$ 9.2
Contingent consideration liabilities recorded for business combinations	$ 8.7
Minimum [Member]
Commitments Contingencies And Litigation [Line Items]
Duration of renewal options of facilities under operating leases	1 year
Maximum [Member]
Commitments Contingencies And Litigation [Line Items]
Duration of renewal options of facilities under operating leases	5 years

Commitments and Contingencies58

Commitments and Contingencies - Aggregate Minimum Rental Commitments for Non-Cancelable Operating Leases (Detail) $ in Millions	Jun. 30, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,019	$ 6
2,020	3.6
2,021	1.6
2,022	0.4
2,023	0.3
Thereafter	0.1
Total minimum operating lease payments	$ 12

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Stock repurchase program authorized amount	$ 1,300,000,000
Common stock repurchase program expiry date	Jul. 31, 2019
Stock repurchase program remaining authorized amount	$ 226,100,000

Stockholders' Equity - Shares R

Stockholders' Equity - Shares Reserved for Future Issuance (Detail) - shares	Jun. 30, 2018	Jun. 24, 2017
Class of Stock [Line Items]
Awards available for grant under all share-based compensation plans	2,210,217	2,947,069
Reserved for future issuance	6,331,251
Stock options outstanding [Member]
Class of Stock [Line Items]
Awards available for grant under all share-based compensation plans	1,618,209
Deferred stock units outstanding [Member]
Class of Stock [Line Items]
Awards available for grant under all share-based compensation plans	1,853,558
Market stock units outstanding [Member]
Class of Stock [Line Items]
Awards available for grant under all share-based compensation plans	354,726
Performance stock units outstanding [Member]
Class of Stock [Line Items]
Awards available for grant under all share-based compensation plans	294,541

Share-Based Compensation - Shar

Share-Based Compensation - Share-Based Compensation Awards Available for Grant or Issuance (Detail)	12 Months Ended
	Jun. 30, 2018shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance beginning	2,947,069
Additional shares authorized	2,346,384
Stock options granted	(61,825)
Deferred stock units granted	(1,331,073)
Market stock units granted	(300,071)
Performance stock units granted	(315,380)
Market stock units performance adjustment	68,003
Purchases under employee stock purchase plan	(486,263)
Forfeited	692,035
Plan shares expired	(4,500)
Fungible Shares Ratio Adjustment	(1,344,162)
Balance ending	2,210,217
2010 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance beginning	380,170
Additional shares authorized	346,384
Purchases under employee stock purchase plan	(486,263)
Balance ending	240,291
2001 [Member] | Incentive Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Forfeited	4,500
Plan shares expired	(4,500)
2010 [Member] | Incentive Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Balance beginning	2,566,899
Additional shares authorized	2,000,000
Stock options granted	(61,825)
Deferred stock units granted	(1,331,073)
Market stock units granted	(300,071)
Performance stock units granted	(315,380)
Market stock units performance adjustment	68,003
Forfeited	687,535
Fungible Shares Ratio Adjustment	(1,344,162)
Balance ending	1,969,926

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount		$ 25.7
Retained Earnings [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount		24.7
Additional Paid-in Capital [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount		$ 1
ASU for Compensation-Stock Compensation [Member] | Retained Earnings [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount	$ 24.7
ASU for Compensation-Stock Compensation [Member] | Additional Paid-in Capital [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount	1
Deferred Tax Assets for Research Credit and Alternative Minimum Tax Credit Carryforwards [Member] | ASU for Compensation-Stock Compensation [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Net cumulative effect, change in amount	$ 25.7

Share-Based Compensation - Sh63

Share-Based Compensation - Share-Based Compensation and Related Tax Benefit Recognized in Consolidated Statements of Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 71.3	$ 61.8	$ 56.8
Income tax benefit on share-based compensation	11.1	16.1	14.7
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	3.2	2.2	1.8
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	38.6	33.1	30.6
Selling, General, and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total	$ 29.5	$ 26.5	$ 24.4

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Options - Additional Information (Detail) - Stock option outstanding [Member] - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 29, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of fair market value for which exercise price is designated on incentive and nonqualified stock option grants	100.00%
Options granted under the 2010 Plan	vest three to four years from the vesting commencement date and expire seven years after the date of grant if not exercised.
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 50.37
Percentage of stock option awards outstanding were vested	32.00%
Number of options vested	1.6
Aggregate intrinsic value of fully vested options and options expected to vest	$ 9.2
Weighted average exercise price of fully vested options and options expected to vest	$ 57.14
Weighted average remaining contractual term of fully vested options and options expected to vest	3 years 3 months 21 days
Weighted average remaining contractual term for exercisable options	2 years 11 months 15 days
Unrecognized share-based compensation costs for stock options granted	$ 4.3
Unrecognized share-based compensation, period for recognition	1 year 5 months 4 days

Share Based Compensation - Bala

Share Based Compensation - Balance of Outstanding and Exercisable Stock Options (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Option Awards Outstanding, Balance at June 2017 | shares	2,490,168
Stock Option Awards Outstanding, Granted | shares	61,825
Stock Option Awards Outstanding, Exercised | shares	(690,310)
Stock Option Awards Outstanding, Forfeited | shares	(105,124)
Stock Option Awards Outstanding, Expired | shares	(138,350)
Stock Option Awards Outstanding, Balance at June 2018 | shares	1,618,209
Stock Option Awards Outstanding, Exercisable at June 2018 | shares	1,378,833
Weighted Average Exercise Price, Balance at June 2017 | $ / shares	$ 49.20
Weighted Average Exercise Price, Granted | $ / shares	45.32
Weighted Average Exercise Price, Exercised | $ / shares	24.08
Weighted Average Exercise Price, Forfeited | $ / shares	59.36
Weighted Average Exercise Price, Expired | $ / shares	72.08
Weighted Average Exercise Price, Balance at June 2018 | $ / shares	57.14
Weighted Average Exercise Price, Exercisable at June 2018 | $ / shares	$ 57.09
Intrinsic Value, Balance at June 2018 | $	$ 9.2
Intrinsic Value, Exercisable at June 2018 | $	$ 8.9

Share-Based Compensation - Cash

Share-Based Compensation - Cash Received and Aggregate Intrinsic Value of Stock Options Exercised (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Cash received	$ 16.7	$ 10.7	$ 16.6
Aggregate intrinsic value	$ 15.2	$ 12.3	$ 29.7

Share-Based Compensation - Fair

Share-Based Compensation - Fair Value of Each Award Granted Under Stock Option Plans (Detail) - $ / shares	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Stock option outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	46.20%
Expected life in years	4 years 4 months 24 days
Risk-free interest rate	1.80%
Fair value per award	$ 18.04	$ 21.08	$ 28.30
Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility		52.54%	45.57%
Expected life in years		2 years 11 months 1 day	2 years 11 months 8 days
Risk-free interest rate		1.01%	0.92%
Fair value per award		$ 67.51	$ 126.74
Correlation coefficient		45.00%	42.00%
Market stock units outstanding [Member] | SOX Index [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility		21.23%	19.65%
Minimum [Member] | Stock option outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility		45.20%	40.40%
Expected life in years		3 years 9 months 18 days	3 years 9 months 18 days
Risk-free interest rate		1.03%	1.22%
Minimum [Member] | Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	49.16%
Expected life in years	2 years 9 months 18 days
Risk-free interest rate	1.72%
Fair value per award	$ 48.22
Correlation coefficient	52.00%
Minimum [Member] | Market stock units outstanding [Member] | SOX Index [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	22.37%
Maximum [Member] | Stock option outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility		48.30%	44.20%
Expected life in years		4 years 7 months 6 days	4 years 7 months 6 days
Risk-free interest rate		1.94%	1.72%
Maximum [Member] | Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	50.60%
Expected life in years	2 years 11 months 1 day
Risk-free interest rate	1.88%
Fair value per award	$ 59.19
Correlation coefficient	53.00%
Maximum [Member] | Market stock units outstanding [Member] | SOX Index [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	22.52%

Share-Based Compensation - Defe

Share-Based Compensation - Deferred Stock Units - Additional Information (Detail) - Deferred stock units outstanding [Member] - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 29, 2018	Jun. 24, 2017	Jun. 25, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
DSUs granted under the 2010 Plan	vest ratably over three to four years from the vesting commencement date.
Shares withheld to meet statutory minimum tax withholding requirements	138,499
Shares valued withheld to meet statutory minimum tax withholding requirements	$ 5.4
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding		$ 50.37
Unrecognized share-based compensation cost for DSUs granted	$ 108.1
Unrecognized share-based compensation, period for recognition	2 years 10 days
Aggregate market value of DSUs	$ 21.4		$ 24.3	$ 26.7

Share-Based Compensation - Bala

Share-Based Compensation - Balance and Aggregate Intrinsic Value of Stock Units (Detail) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards, Granted	300,071
Stock Unit Awards, Performance adjustment	(68,003)
Deferred stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance at June 30, 2017	1,320,798
Stock Unit Awards, Granted	1,331,073
Stock Unit Awards, Delivered	(545,028)
Stock Unit Awards, Forfeited	(253,285)
Stock Unit Awards Outstanding, Balance at June 30, 2018	1,853,558
Aggregate Intrinsic Value, Balance at June 30, 2018 | $	$ 93.4
Weighted Average Grant Date Fair Value, Balance at June 30, 2017 | $ / shares	$ 69.14
Weighted Average Grant Date Fair Value, Granted | $ / shares	40.52
Weighted Average Grant Date Fair Value, Delivered | $ / shares	70.26
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	58.42
Weighted Average Grant Date Fair Value, Balance at June 30, 2018 | $ / shares	$ 49.75
Market stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock Unit Awards Outstanding, Balance at June 30, 2017	158,596
Stock Unit Awards, Granted	300,071
Stock Unit Awards, Performance adjustment	(68,003)
Stock Unit Awards, Forfeited	(35,938)
Stock Unit Awards Outstanding, Balance at June 30, 2018	354,726
Aggregate Intrinsic Value, Balance at June 30, 2018 | $	$ 17.9
Weighted Average Grant Date Fair Value, Balance at June 30, 2017 | $ / shares	$ 82.88
Weighted Average Grant Date Fair Value, Granted | $ / shares	53.02
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	76.93
Weighted Average Grant Date Fair Value, Balance at June 30, 2018 | $ / shares	$ 59.37

Share-Based Compensation - Mark

Share-Based Compensation - Market Stock Units - Additional Information (Detail) - Market stock units outstanding [Member] $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)$ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Potential payout range	100.00%
Potential payout adjustment ratio	2.00%
Closing price of common stock used to calculate Aggregate intrinsic value of stock option outstanding | $ / shares	$ 50.37
Unrecognized share-based compensation cost | $	$ 14.4
Unrecognized share-based compensation, period for recognition	1 year 1 month 13 days
October 2014 MSU Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
SOX Index TSR percentage points	118.00%
Percentage of targeted shares, MSU grants	0.00%
October 2015 MS Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
SOX Index TSR percentage points	115.00%
Percentage of targeted shares, MSU grants	0.00%
October 2016 MSU Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
SOX Index TSR percentage points	60.00%
Percentage of targeted shares, MSU grants	0.00%
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Share-based Compensation Award, First Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	1 year
Share-based Compensation Award, First Tranche [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Second Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	2 years
Share-based Compensation Award, Second Tranche [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	100.00%
Share-based Compensation Award, Third Tranche [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years

Share-Based Compensation - Perf

Share-Based Compensation - Performance Stock Units - Additional Information (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock units, granted	300,071
Performance stock units outstanding [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	3 years
Vesting percentage of the underlying awards	33.33%
Stock units, granted	315,380
Stock units, delivered	0
Stock units, forfeited	20,839
Aggregate intrinsic value | $	$ 14.8
Requisite service period	3 years
Unrecognized share-based compensation cost | $	$ 7.7
Unrecognized share-based compensation, period for recognition	1 year 5 months 1 day
Performance stock units outstanding [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	0.00%
Threshold percentage of earnings per share to trigger pay out	65.00%
Performance stock units outstanding [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout range	200.00%
Threshold percentage of earnings per share to trigger pay out	135.00%

Share-Based Compensation - Empl

Share-Based Compensation - Employee Stock Purchase Plan - Additional Information (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock purchases under Employee Stock Purchase Plan as a percentage of employee compensation, maximum, subject to legal restrictions and limitations	15.00%
Employee common stock purchases through payroll deductions under Employee Stock Purchase Plan, price as a percentage of fair market value	85.00%
Offering period extends under Employee Stock Purchase Plan	up to two years
Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of the underlying awards	2 years
Expected lives of the implied volatility	6 months
Historical volatility for expected lives	6 months
Unrecognized share-based compensation costs for stock options granted	$ 12.9
Period over which share-based compensation is amortized duration	16 months

Share-Based Compensation - Sh73

Share-Based Compensation - Shares Purchased, Weighted Average Purchase Price, Cash Received, and Aggregate Intrinsic Value for ESPP (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchased	486,263
Aggregate intrinsic value	$ 9.2
Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares purchased	486,263	302,085	302,781
Weighted average purchase price	$ 32.07	$ 46.74	$ 52.42
Cash received	$ 15.6	$ 14.1	$ 15.8
Aggregate intrinsic value	$ 3.9	$ 2.7	$ 7

Share-Based Compensation - Fa74

Share-Based Compensation - Fair Value of Each Award Granted Under ESPP (Detail) - Employee Stock Purchase Plan [Member] - $ / shares	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life in years	6 months
Fair value per award	$ 13.54	$ 20.44	$ 24.52
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	43.70%	38.40%	37.40%
Expected life in years	6 months	6 months	6 months
Risk-free interest rate	1.42%	0.62%	0.33%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	49.80%	54.90%	40.60%
Expected life in years	2 years	2 years	1 year
Risk-free interest rate	2.45%	1.20%	0.54%

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Compensation And Retirement Disclosure [Abstract]
Annual limit of employees contribution to defined contribution plan	$ 18,500
Annual limit of contribution for 50 years or older employees	$ 24,500
Percentage of maximum employer matching contribution to defined contribution plans	25.00%
Employer matching fund vested period	4 years
Employer matching funds vest percentage	25.00%
Contributions by employer matching contributions	$ 2,800,000	$ 2,300,000	$ 2,500,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016	Jun. 27, 2015
Income Tax Disclosure [Line Items]
U.S. federal corporate tax rate	21.00%	35.00%		28.17%
Provisional tax expense				$ 41,400,000
One-time transition tax expense				44,100,000
Benefit from remeasurement of deferred tax at new tax rate				2,700,000
Increase in income tax iability, net of foreign tax and research credits				11,600,000
Provision/(benefit) for income taxes				40,500,000	$ 12,200,000	$ 3,400,000
Net deferred tax assets	$ 15,900,000			15,900,000	23,100,000
Valuation allowance	23,300,000			23,300,000	15,800,000
Net increase in valuation allowance				7,500,000
Undistributed earnings of foreign subsidiaries accounted for one-time transition tax	751,900,000			751,900,000
Federal alternative minimum tax credit carryforward	1,600,000			1,600,000
Gross unrecognized tax benefits	24,800,000			24,800,000	15,200,000	13,400,000	$ 11,600,000
Gross unrecognized tax benefits increased during the year				9,600,000
Unrecognized tax benefit, reduction of effective tax rate if recognized	17,500,000			17,500,000
Increase (decrease) in interest and penalties accrued related to unrecognized tax benefits				700,000	(200,000)	$ 300,000
Interest and penalties accrued related to unrecognized tax benefits	1,900,000			1,900,000	1,200,000
Estimated decrease in unrecognized tax benefit in next 12 months	1,900,000			1,900,000
Estimated increase in unrecognized tax benefit in next 12 months	3,200,000			3,200,000
Cumulative-effect adjustment related to retained earnings, tax					8,300,000
Federal [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	100,000			100,000
Tax credit carryforward, amount	7,000,000			7,000,000
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	33,200,000			$ 33,200,000
Net operating loss, beginning of expiration period				2,020
Tax credit carryforward, amount	$ 34,100,000			$ 34,100,000
Undistributed Foreign Earnings [Member]
Income Tax Disclosure [Line Items]
Provision/(benefit) for income taxes				$ 0
Cash Assets [Member]
Income Tax Disclosure [Line Items]
One-time transition tax rate on post-1986 foreign earnings and profits	15.50%			15.50%
Other Specified Assets [Member]
Income Tax Disclosure [Line Items]
One-time transition tax rate on post-1986 foreign earnings and profits	8.00%			8.00%
Other Assets [Member]
Income Tax Disclosure [Line Items]
Net deferred tax assets	$ 15,900,000			$ 15,900,000	$ 23,100,000
Scenario, Plan [Member]
Income Tax Disclosure [Line Items]
U.S. federal corporate tax rate			21.00%

Income Taxes - Tabular Disclosu

Income Taxes - Tabular Disclosure of Income (Loss) Before Income Tax Between Domestic and Foreign Jurisdictions (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Income/(loss) before provision for income taxes	$ (81.8)	$ 61.3	$ 75.6
United States [Member]
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Income/(loss) before provision for income taxes	(51.1)	(10.1)	12.3
Foreign [Member]
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Income/(loss) before provision for income taxes	$ (30.7)	$ 71.4	$ 63.3

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Current tax expense
Federal	$ 21.5	$ 9.6	$ 12.1
Foreign	14.1	25.5	12.4
Current Income Tax Expense, Total	35.6	35.1	24.5
Deferred tax expense/(benefit)
Federal	14.4	(10.6)	(7.5)
Foreign	(9.5)	(12.3)	(13.6)
Deferred Income Tax Expense/(Benefit), Total	4.9	(22.9)	(21.1)
Provision for income taxes	$ 40.5	$ 12.2	$ 3.4

Income Taxes - Provision for 79

Income Taxes - Provision for Income Taxes Differs from Federal Statutory Rate (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Income Tax Disclosure [Abstract]
Provision at U.S. federal statutory rate	$ (22.9)	$ 21.5	$ 26.6
Qualified stock options	4.9	5.5	5.1
Shortfall related to share-based compensation	4.1
Business credits	(4.9)	(3.6)	(10.3)
Foreign tax differential	16.5	(13.2)	(22.4)
Non-deductible portion of contingent consideration		0.9	0.9
Change in valuation allowance		(0.8)	(1.4)
Nondeductible amortization	1.2	1.6	4.4
Taxes associated with one-time transition tax	44.1
Impact of corporate tax rate change on deferred taxes	(2.7)
Other differences	0.2	0.3	0.5
Provision for income taxes	$ 40.5	$ 12.2	$ 3.4

Income Taxes - Significant Comp

Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Deferred tax assets:
Investment writedowns	$ 1.1	$ 1.8
Inventory writedowns	11.6	7.4
Property and equipment	1.9	3
Accrued compensation	0.1	0.2
Deferred compensation	0.6	1.9
Share-based compensation	11.1	15.6
Business credit carryforward	25.3	19.2
Net operating loss carryforward		0.3
Acquisition intangibles	0.6
Other accruals	1.6	2
Deferred Tax Assets, Gross	53.9	51.4
Valuation allowance	(23.3)	(15.8)
Deferred Tax Assets, Net	30.6	35.6
Deferred tax liabilities:
Acquisition intangibles		(9.2)
Interest	(14.7)	(3.3)
Deferred tax liabilities, Total	(14.7)	(12.5)
Net deferred tax assets	$ 15.9	$ 23.1

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Income Tax Disclosure [Abstract]
Beginning balance	$ 15.2	$ 13.4	$ 11.6
Increase in unrecognized tax benefits related to current year tax positions	10.5	2.5	1.6
Increase in unrecognized tax benefits related to prior year tax positions		0.1	1.1
Decrease due to statute expiration	(0.9)	(0.8)	(0.9)
Ending Balance	$ 24.8	$ 15.2	$ 13.4

Segment, Customers, and Geogr82

Segment, Customers, and Geographic Information - Additional Information (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2018USD ($)SegmentProductReportingUnit	Jun. 24, 2017USD ($)	Jun. 25, 2016USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | Segment	1
Number of product | Product	3
Goodwill | $	$ 372.8	$ 206.8	$ 206.8
Number of reporting units | Segment	2
Internet of Things and Mobile/PC
Segment Reporting Information [Line Items]
Goodwill | $	$ 372.8
Number of reporting units | ReportingUnit	2

Segment, Customers, and Geogr83

Segment, Customers, and Geographic Information - Net Revenue within Geographic Areas Based on Customers' Locations (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 1,630.3	$ 1,718.2	$ 1,666.9
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	803.2	844.8	518.7
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	358.6	426.5	651
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	235.2	66.4	61.1
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	90.9	231.4	249.1
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	74.9	25.3	4.5
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 67.5	$ 123.8	$ 182.5

Segment, Customers, and Geogr84

Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Revenue from External Customer [Line Items]
Net revenue	$ 1,630.3	$ 1,718.2	$ 1,666.9
Mobile Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	1,021	1,406	1,398.2
PC Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	257.8	229.2	207.4
Internet of Things Product Applications [Member]
Revenue from External Customer [Line Items]
Net revenue	$ 351.5	$ 83	$ 61.3

Segment, Customers, and Geogr85

Segment, Customers, and Geographic Information - Long-Lived Assets within Geographic Areas (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Long Lived Assets By Geographical Areas [Line Items]
Long-lived assets	$ 709.8	$ 421.6
United States [Member]
Long Lived Assets By Geographical Areas [Line Items]
Long-lived assets	193.3	159.4
Asia/Pacific [Member]
Long Lived Assets By Geographical Areas [Line Items]
Long-lived assets	273.8	$ 262.2
Europe [Member]
Long Lived Assets By Geographical Areas [Line Items]
Long-lived assets	$ 242.7

Segment, Customers, and Geogr86

Segment, Customers, and Geographic Information - Major Customers' Revenue as a Percentage of Total Net Revenue (Detail) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	15.00%	24.00%	20.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	12.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		19.00%	21.00%
Customer D [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		10.00%
Customer E [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage			15.00%

Segment, Customers, and Geogr87

Segment, Customers, and Geographic Information - Major Customers' Revenue as a Percentage of Total Net Revenue (Parenthetical) (Detail)	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Maximum [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	10.00%

Restructuring Activities - Rest

Restructuring Activities - Restructuring Liability Activities (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
November 2017 and April 2018 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Additional accruals	$ 12
Cash payments	(9)
Non-cash settlements	(0.7)
Ending Balance	2.3
November 2017 and April 2018 Restructuring Plan [Member] | Employee Severance and Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Additional accruals	11
Cash payments	(8.8)
Ending Balance	2.2
November 2017 and April 2018 Restructuring Plan [Member] | Facility Consolidation and Related Charges [Member]
Restructuring Cost And Reserve [Line Items]
Additional accruals	1
Cash payments	(0.2)
Non-cash settlements	(0.7)
Ending Balance	0.1
June 2016 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		$ 6.7
Additional accruals		7.3	$ 6.7
Adjustments	(0.2)
Cash payments	(0.4)	(12.6)
Non-cash settlements		(0.8)
Ending Balance		0.6	6.7
June 2016 Restructuring Plan [Member] | Employee Severance and Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		6.7
Additional accruals		5	6.7
Cash payments		(11.7)
Ending Balance			$ 6.7
June 2016 Restructuring Plan [Member] | Facility Consolidation and Related Charges [Member]
Restructuring Cost And Reserve [Line Items]
Additional accruals		2.3
Adjustments	(0.2)
Cash payments	$ (0.4)	(0.9)
Non-cash settlements		(0.8)
Ending Balance		$ 0.6

Restructuring Activities - Addi

Restructuring Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 26, 2015	Jun. 30, 2018	Jun. 24, 2017	Jun. 25, 2016
Restructuring And Related Activities [Abstract]
Restructuring costs	$ 1.9	$ 12	$ 7.3	$ 8.6

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] $ in Millions	Aug. 22, 2018USD ($)
Minimum [Member]
Subsequent Event [Line Items]
Estimated cost of restructuring action for seond quarter of fiscal 2019	$ 8
Maximum [Member]
Subsequent Event [Line Items]
Estimated cost of restructuring action for seond quarter of fiscal 2019	$ 10